357 Mag went from 6" group at 200 to 15" at 100 ???????

Status
Not open for further replies.

Hummer70

Member
Joined
Apr 11, 2009
Messages
613
Location
Cradle of the Confederacy
FWIW I had a interesting experience. Before I left the Army Small Cal Lab I loaded up ammo and took my Marlin 1894 357 out to range loaded with 15 gr 2400 and it grouped six inches at 200 yards which I thought was great.

I came back reloaded the same brass with same box of bullets (Sierra 158 gr JSP) and same primers and switched to Blue dot and went from six inches at 200 yards to 15" at 100 yards.

Anybody got any ideas of what happened to cause such a change in extreme spread?
 
a 357 at 200 yards!!! I didn't even know you could push one that far and have consistency. Shows ya what I know. Sounds like great shooting to me. I'll have to agree with Walkalong, it would appear that changing powders is the reason for the big difference in accuracy.
 
Obviously you must have rested the gun to get that kind of accuracy. Different rest? point of contact when resting a gun can make a dramatic difference in accuracy and generally a different POI than when shooting freehand. You were at or over max with the 2400 and a 158 jacketed pill, you didn't say what the load was with Bluedot. Could be a big change i velocity made for a big change in accuracy. Most reloading manuals recommend only new or once fired brass for max loads in .357 carbines because of the way their bolt locks up at the rear, thus causing cases to stretch. This also could have a impact.
 
No same rest, same everything. My loading manual for 2400 listed 15 gr 2400 and I have shot thousands of rounds with that load. I agree most now do not.
Obviously the Blue Dot was the problem and it was a book load so what happened that caused the big change?

I was working at the Army Small Cal Lab at the time and I asked everybody in the lab and no one had a clue and one was an ammo engineer at Frankford Arsenal. Then William C. (Bill) Davis visited us one day. He was the Dean of Small Arms knowledge so I posed the question to him. He thought about it and had never seen that problem but surmised what it must have been. It was going to take soft recovery protocol to determine if the theory was correct which we did not have at Picatinny.

I got to Aberdeen Proving Ground and posed that question to the tech guru and he also knew Bill and worked with him when he was a Test Director at the PG. So he said the theory sounded good and indicated Aberdeen had soft recovery so we shot it and retrieved the bullet. It was exactly what Bill guessed it was.

So I will leave it to you guys to figure out what the problem was.
 
I don't know what the issue was with the Blue Dot but I did know Bill Davis. Whenever we had a question or a problem I called him. He always helped and I accepted his information as gospel.
 
So the factor here is the blue dot. Was the blue dot stored long term? Maybe the powder got moist? Moist powder weighs more than dry and will throw off the book loads. Maybe your gun just plain doesn't like blue dot? I don't know. Just trying to think here.
 
It's obvious. You are color sight challenged and used Green Dot instead. :D
 
  • Like
Reactions: FWP
The winner will be issued one ATTABOY ! ! ! ! !! , won't that be exciting! ! ! ! ! :):D

FWP, yep if Bill did not know it nobody would. He left the Proving Ground and went to FA, and if I remember right he went to Colt, then came back to the gov't.
 
After he retired from FA he moved up to his home in Wellsboro, PA. I talked to him a few times after he moved. He may have opened a small ballistic lab or think tank up there.
 
There are only two possible explanations.

1) The first group was measured in Imperial inches and the second group was measured in metric inches.
2) You aren't as good a shot as you used to be.

It's science.
 
Why are you surprised a different powder gave you different results? Even when loading the same powder, if you change charge weights accuracy is effected. It seems you only shot one load of Blue Dot, maybe it's just not an accurate load.

Another thought, did you lead the barrel during the first range trip? It's possible the poor accuracy would be caused by leading.
 
Different powder gave you a different pressure spike, different velocity, and different barrel harmonics. You did say JSP so I'd rule out leading, but maybe the bullet didn't obturate enough and tumbled?
 
Try sum 300 MP.
I never liked BD in 357 mag for pistol although it did okay with 180gr + bullets in a 4" trooper.
 
FWP, yes he moved to Wellsboro and he and Charlie Fagg opened Tioga Engineering and he did test work for the industry. Tioga's phone went dead several years back but I don't know what happened or why. Charlie bought Larry Moores spotting scope and I got several of his guns when he died along with his milling machine up in Knoxville. Larry's wife Catherine died like four months after he did.

Larry's passing was a very very bad shock to me as he was my mentor and is the one that got me into the Army Small Cal Lab and I suspect Aberdeen PG. I didn't think I could handle the funeral until Catherine called me and told me Larry had already been cremated. I figured I could handle that and we drove up and I wound up carrying Larry in our car from the funeral home to his home. Larry's guns were being sold off for minimal prices as Larry's sister in law came down from I think it was Vermont and she told a mutual friend of me and Larry to just sell everything quickly and not worry about the prices he got and I got the last four of his rifles. I would have bought every one he had had I know they were being sold sooner. Still have three of them, all with stocks Larry made himself. Two are left hand Mauser 3000s with Larry's stripper clip load modifications and one is a 1903 with a 1903A4 bolt in it and a barrel 1.400" diameter from action to muzzle. UNFIRED Larry built it for a 30.06 test bed and got sick as soon as he finished it and never shot it. We stopped by to see them on the way home from Camp Perry and he could barely get around. It was a real heart breaker to see my buddy in that condition.

Larry and Bill were very good friends as well as they worked together as Test Directors at Aberdeen and as ammo engineers at FA.

This question is a Larryism for lack of a better term. Larry would not directly answer a question and wanted his people to think about it. Larry was a Section Chief in Weapons at Aberdeen and that was his way of making better test directors. Get them to think and think and think. There were guys there that Larry had hired back in 50s and they told me I was using his desk and chair in the a cubicle with Otto Hanel who was also a treasure trove of information and was a good friend of Larry's as well. Otto and Larry got to the PG in I think it was 48 and that was a pair. Larry followed Bill Davis to FA and Larry wound up as Chairman of the Configuration Control Board at RIA.

Oh yeah Bullseye 308's guess is headed in the right direction. He is getting warm.
 
Last edited:
So I will leave it to you guys to figure out what the problem was.

Ok, I'll bite: the second load exhibited lower peak pressure, thereby reducing obturation into the rifling, and increasing skidding across the rifling. You would need to soft recover a slug to look at rifling engraving to confirm that.

This is a familiar problem to cast bullet users.

Edit: I see Bullseye 308 was already headed in this direction.
 
Thanks for the update Hummer 70. Did Charlie Fagg work at FA? I met some of the guys Bill worked with but do not remember any names.

BTW you mention the phones in Wellsboro going dead. I had the same experience. I had a question and decided to call Bill. The phone was dead or out of service. I had no other contact info an did not know he had passed until I saw it in the Rifleman.
 
Hmm
I suspected this was a pop quiz

Alliant has issued warnings about high pressure with Blue dot and 357 and 41 magnums

So, I wondered if this could be related....soft recovery of the bullet has been mentioned!
So, I set my Henry 357 on the ground, made sure it was perfectly plumb with my transit.

Shot a round loaded with bluedot straight up and caught it with my catchers mitt as it came down
Upon observation, the base of the bullet was deformed.....kind of concave shape

I suspect bluedot has too fast of a pressure spike

I'd recommend going back to 2400

HEY....IT WAS AN OPEN BOOK POP QUESTION:D
Might as well have some fun!
 
Not sure if Charlie worked at FA. The guy that trained me (Roscoe Picard) told me his background and at one time he worked for the Bureau of Indian Affairs or some such name. At any rate Charlie worked at RIA.
Now Roscoe was a treasure trove to beat all. He was a crusty old bachelor about early 50s when I went to the Army Small Cal Lab at Picatinny. Roscoe had started out in small arms at Springfield Armory about 1951 and stayed there till Robert McNamara shut it down. McNamara's name was lower than (well it was very low) in the small arms community. Bottom line is small arms integrity has not returned to this day to my knowledge. Absolutely no one had anything good to say about him and up until that time I thought he was OK but when the top small arms guys in the gov't badmouth him to a man well................. if it walks like a duck, talks like a duck it must be.......................a duck.

Roscoe took the transfer to RIA in 67 and to Picatinny in 76? time frame.

Roscoe and Charlie were good friends and introduced us and I would see him when he came to Camp Perry but never had any direct work related functions with him.

Since I was a young bachelor our mutual friend Larry Moore suggested Roscoe and I might rent a place so we found a third floor of a large house built about 1900 in Milford, Pa. The landlord thought he was renting a 2 BR appt with living room but we quickly proved he rented us 2 BR, a loading room (bedroom converted) and a living room (which became a drafting area and weapons bunker as we had two gun vaults and a six foot drafting table in there with my bed.

When I walked into the Army Small Cal Lab I held a Master Card Highpower and Smallbore and had been loading for 20+ years and thought I knew something and I figured out within hours that all I thought I knew was almost worthless in that atmosphere as that was a breed you don't find except rarely. I was assigned to Roscoe who talked incessantly and I listened intently. I never asked or saw Roscoe asked a question he could not field on his hind legs.
Roscoe apparently had a photographic memory. He could quote quicker than Google the most incredible minutia of the smallest part on anything small arms had ever done.

For instance on the second floor of Springfield Armory Museum there are about 40 4 drawer file cabinets which are marked with decals identical to our office which contained about 15 of them. Starting in early 50s for entertainment Roscoe (who had no use for TVs) would take weapons files home (about 3 to 5 per night) and read them cover to cover, come back the next day and replace them and get the next load. The data in them covered 174 years of weapons engineering and Roscoe read every last folder in every cabinet from 51 to about 67.

Every part of every weapon has a separate engineering file and that will give you the complete history of the part from it's first production to date. If a change was made to that part the entire history was there from why the change was made and what the change was and some of them had as many as ten revisions.

The logic is they wanted to design weapons packages that were considered CLEAN TECH DATA Packages. When I was there Roscoe made a change on the leaf spring of the M1911A1 and he announced it was then a CLEAN TDP and that was 1979 so it only took 68 years to clean it up and the politicians dumped the M1911A1 for a 9MM.

For instance the M16 had sustained about 550 product improvements when I got there from mid 60s to 78 and I suspect it is about 700 now.

Another thing that struck me quickly, no one ever told anyone else they didn't know what they were talking about like you find on lots of forums. I figured out quickly that everyone there had different experiences in the weapons field and when something new was surfaced it was never challenged.

We would pull up chairs and 5 to 8 of us would sit in circles and talk guns and problems worked through in the past. At first I was uncomfortable as the boss would walk by to and from the head and never say anything about getting back to work and one day he explained how the round circles were beneficial. He said he liked to see such as we talked nothing but guns, guns, guns and reloading and he saw that as continual education in our field and he would never break such up.

I could go ask anyone anything in the office and they would stop and explain what I needed to know. Well let me clarify that, there was some that didn't know where they were standing much less what you needed to know which was explained by Larry Moore this way, "you will find managers in the government and you will wonder how they got to where they are with what they know." Within 30 days I called him at Rock Island and told him I then understood and he was impressed I had figured it out that quickly. haha

The only thing the boss asked that when we had a fire (something big) we all dropped everything and go flat out till it was over and then we could get back to learning and that is exactly what happened. The "fires" lasted maybe a week and once it was out of the way it was back to training so to speak.

Then the Dover Devil MG project hit (its on the internet under Dover Devil Machinegun) and we got 1.8 million to handbuild four Dover Devils as No 1 was a minimal working model guys in the lab came up with. Their group consisted of four people and when Congress gave us the 1.8 million the group went to about 15 and to my great surprise the boss picked me for the team.

To be sure I was the last one chosen as I was the "new kid on the block" but the boss and me were the first ones to go to the new area to set up so the rest of the folks could make the change of locations within hours instead of months. I would meet with the Chief every morning at 0800, get assignments and he and I took off in different directions. I would meet him back at lunch and give him a update. He initially told me I could not do it all myself and that he would get me some help but he couldn't figure out who to ask and told me not to worry if I could not get it done because he had a "6" priority which meant in those days you could get it two weeks BEFORE you asked for it. All he wanted to know was who I talked to and who was saying "NO".

As it turned out the network I had established in previous year consisted of fraternal types all over the arsenal for the most part and it was better than already having it in stock. I got 16 desks, chairs, file cabinets, security cabinets, lamps, etc delivered in 30 hours and set up to receive the rest of the crew and the group was up and functional in another 72 hours as outlined below.The chief could not believe it and told me he was hoping to have it set up and running in a month and he was really happy.

Only thing I could not get was 60" drafting tables as there was only one on the arsenal and it was in the CGs office. Boss told me to requisition them through procurement and that was stopped by transportation office. The first gas shortage was in place and we could not take a gov't truck over 100 miles and transportation office badmouthed the request for a 10 ton truck for me to go get them. I couldn't bust through so I told the Chief. He left immediately and next morning he gave me travel orders to fly to Ohare airport, get the biggest Ryder rental I could get, go to factory in Wisconsin, pick them up and bring them "home". Travel office called complaining that we ought to be able to get them locally. I handed the phone to the Chief who read her the RIOT ACT about stupid regs and the next morning the arsenal sent a truck to South Joysey and picked them up and delivered them to our office that afternoon. 72 hours later we had the new drafting tables delivered and the entire team was up and running.

Within a month I got a call wanting me to come to Crane Naval Wpns Center as the Navy POC for all marksmanship teams. I turned it down because I told them my chief was depending on me and that I would not leave him till the project was completed.

The entire team got the Army R&D Award and every member got a Commendation signed by a Major General and I cannot find anyone that has ever seen one signed by anything above a Colonel.

When the Chief retired at Rock Island there was a sniper rifle conference the same day in the morning and I was requested to come and make a presentation and did. We had the conference, agreed on what was needed and went to his retirement luncheon and he recognized me and told everyone I was the best he had ever seen at getting what was need quickly.
 
Last edited:
How long of an interval between shooting the 2400 and the Blue Dot? What kind of sights or scope was being used? What was holding the gun?

Sights can come loose, scopes can come loose, eyesight get worse over time, shooting from a rest vs standing, maybe the barrel was fouled up and full of lead when shooting the Blue Dot, maybe the sun was in your eyes, maybe you didn't drink your morning coffee....
 
Status
Not open for further replies.
Back
Top