Discussion in 'Rifle Country' started by Walkalong, Dec 21, 2018.
Be a ground breaker and dual wield them bad boys at the next PRS match
I loaded up for the Match that got postponed until Dec 14th so I had some time on my hands. I have been wanting to load up 32.3 Grs RL-15 as well as go from the Wilson .266 bushing to the Wilson .265 bushing. I sized ten cases with the .265 bushing and a .239 pin gauge would pass the neck and a .240 would not. That spoke well for Wilson quality control because the cases sized with the .266 bushing would accept the .240 pin gauge but not the .241. It did not necessarily increase neck tension feel while seating as much as it made it more consistent. No more "hmm, that felt lighter" ones.
I loaded those slightly tighter in the neck cases with 32.3 Grs of RL-15 vs 32.0, as well as seating them out .005 longer. Yea, I know, I changed three things.
The velocities I got today backed up why I had issues shooting high at Blakely. I had guessed at a velocity to put in the ballistics program for cooler weather as I had not shot the Dasher in anything but 90 plus temps. I had shot the 6 Creed in the Seekins at 74 & 95 degrees for 2900 & 2985 FPS.
I had to bump the temp up to 94 in the App to get the Mils right in mid 70's weather, and later tweaked my cool weather velocity up. Today verified that I was shooting faster than I guessed in the cooler weather at the match when I blanked the stage shooting high. Barrel seems to have sped up a little as well.
I had an average of 2905 for ten shots at 94 degrees in August for Load # 4 that I shot at the two matches.
Load # 4 today.
68 Degrees 74% RH Cool heavy air with very light wind.
First five shot group.
Second five shot group.
Load # 5 today. (.005 longer, .3 Grs more powder, .001 tigher bushing)
68 Degrees 74% RH
First five shot group.
Second five shot group.
I shot back to back groups with Load # 4 & Load # 5 and chroned them. Then I shot two more groups back to back with Loads # 4 & # 5. I shot the last group (Load # 5) with a guy yapping in my ear wanting to go downrange and post targets. I had told him let me shoot five more shots and he could have it, but instead of going away he yapped and yapped an yapped in my ear while I hurriedly sent five down range to get him to shut up.
Groups for Load # four were .494 & .480. Groups for Load # 5 were .430 & .382. Load # 5 groups were more rounded as well.
So Load # 5 edged out Load # 4 in group size and the ES, SD, & Avg stayed more consistent. This is a small sample and doesn't prove a lot, but it looks good for the slightly tighter neck tension and a hair more powder. Seems to have settled the numbers down a little. I'll try a repeat performance soon.
The primers looked great, just like they did at mid 90's temps, no firing pin flow, flat in the middle but very well rounded on the edges. Look great to me.
..........................................................................................................................Top right Avg for Load # 5 should be 2934
nice. you're shooting 100 fps faster than i am
Do you by chance know the ID of your sized necks?
No I don’t have any fancy pin gages. Where’d you buy those
Amazon, I bought the midrange ones. Good enough for my purposes.
I always just went by feel seating bullets in my Bench gun, but since I have the pin gauges now I checked the necks with them both fired and sized.
https://www.gagesite.com/documents/Gage Makers Tolerance Chart PQI.PDF
When you get the really good ones you need to know the temperature and the heat from your hand can change them. Too close for me.
Pin Gauges come in handy for checking revolver throats etc. Easier than using inside micrometers or small hole gauge sets.
Notice the little tool to check the micrometer is marked .20004 at 20 Degrees Celsius.
The machinists here could likely point us to a better deal or better quality pin gauges. @MachIVshooter in particular.
Take this for what it’s worth.
2,930 is a node that gets repeated over and over for all the 6BR variants from dozens of shooters pursuing the optimum load for these cartridges
Varget, H4895, 105 Hybrid, 108 BT, 6 Dasher, 6 BRA, 6 BRDX, doesn’t matter. Get to 2,930 and shoot small
It really is remarkable
Interesting new powder from Winchester
I expect this is what I’ve been seeing Shane & Jaclyn Bryan shooting the last few months, under secrecy. They’ve spoken very highly about it, dropping charges and getting single digit SD’s. All great things, as can be expected from any previewer, naturally.
Indeed, although stick powders have always ruled at long distance.
I wonder where it falls on the burn rate chart.
I'm going to take a wild guess and say somewhere around the RL16 - H4350 area
From the Teslong Bore Scope I just hooked up to my Android phone.
It has 10 shots down the bore since I cleaned it after fire forming 100 rounds. I was able to find a couple of spots with tiny green dots. (Real tiny)
I have no idea what you guys are talking about but it is really interesting reading. I am blown away by what you guys know. Very cool. Okay, I will shut up now. Pete
Turns out there is a crude focus, I need to play with it.
Pete, don’t shut up, most of this thread is to help spread knowledge and offer info to people who might be interested in long and medium range shooting who think it is supper difficult and involves lots of science and math - this should reduce the intimidation factor
long range is a discipline just like any other, it takes some effort to learn, takes some Money to buy in and is very fun, but don’t think that you need to be quiet or that you know nothing
I’m getting one of those when they come out with a Bluetooth version, supposed to be next month
ditto. Keep asking questions
I always assume, presume maybe, if I can figure something out, it can’t be that terribly difficult. Just have to identify holes in your knowledge base, and ask questions to fill them.
Most importantly - try it. So many folks get caught up in what seems impossible, they never take a chance to prove themselves wrong.
Iosso and Kroil on a patch wrapped around a jag worked back and forth in that area will clean that carbon right up
I am not trying to get it squeaky clean.
Separate names with a comma.