Observation from comparing a bunch of 6.5mm 'match' bullets


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Onewolf
January 23, 2013, 05:36 PM
I am starting my new adventure in long range field/match shooting and I chose the .260 rem as my caliber. I understood that I would eventually need to start handloading rounds in order to optimize loads specifically for my rifle (Savage LRP 260). Today I finally got the last of the orders of 100 pack 6.5mm 'match' bullets that I ordered a while back and I thought it would be interesting to visually compare the 'candidates'. The biggest thing that stands out is the that it appears to me that the manufacturers specifications for G1 BC don't necessarily jibe with what the bullets look like when lined up together. Below are photos of the bullets in order of manufacturers claimed BC from left (lowest) to right (highest). The 'missing' bullet on the right is the Berger 140gr match 'hybrid' which I have not found in stock anywhere. The fat girl on the end is the Lapua 144 HPBT which has a claimed G1 BC of .636. Right....

http://www.onewolf.org/Files/IMG_5845.jpg

http://www.onewolf.org/Files/IMG_5844.jpg

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esheato
January 23, 2013, 05:42 PM
Cool, but why aren't you using G7 BCs?

Onewolf
January 23, 2013, 05:47 PM
From my experience so far, not all manufacturers provide G7 BCs. :confused:

esheato
January 23, 2013, 06:00 PM
Do you have Litzs' book?

Onewolf
January 23, 2013, 06:01 PM
Do you have Litzs' book?

No. Does it provide G7 BCs for all bullets?

esheato
January 23, 2013, 06:05 PM
For a lot, yes. My book is packed right now because I'm moving, but it would be a worthwhile investment.

Link (http://www.appliedballisticsllc.com/index_files/Book.htm)

EDIT: Here (http://www.appliedballisticsllc.com/listofbullets2.pdf) is a listing of the all the bullets Litz has G7 BCs for.

mnhntr
January 23, 2013, 06:20 PM
I will tell you my LRP in .260 liked the 142gr SMK over 44.5gr H4350 in a Win 7mm-08 brass necked down.

Onewolf
January 23, 2013, 06:45 PM
I will tell you my LRP in .260 liked the 142gr SMK over 44.5gr H4350 in a Win 7mm-08 brass necked down.
Good to know. If I had to pick a leading contender it would be the SMK 142. It seems to be a very 'safe' choice.

mnhntr
January 23, 2013, 09:20 PM
The 140gr VLDs were also very accurate but were a chore to find the seating depth they liked.

Onewolf
January 23, 2013, 09:45 PM
The 140gr VLDs were also very accurate but were a chore to find the seating depth they liked.
That's what I have heard. The VLDs have great potential but can be finicky. Since I am a newb, I would like more of a 'sure thing' to start with.

esheato
January 24, 2013, 01:08 AM
It would be difficult to find more of a sure thing than a SMK.

If nothing else, you just try another.

Zak Smith
January 24, 2013, 01:13 AM
Around here, at long-range matches, there are two 6.5mm bullets that the vast majority of competitors use: the 139gr Scenar and the 142gr SMK. Both have won a lot of matches.

USSR
January 24, 2013, 07:12 AM
...there are two 6.5mm bullets that the vast majority of competitors use: the 139gr Scenar and the 142gr SMK.

Yep, used them both in competition, along with just about everybody. The small difference in BC's don't mean squat.

Don

Onewolf
January 24, 2013, 08:24 AM
Last night I loaded six 'sets' of 5 rounds using SMK 142 and H-4350 to perform powder load tests at 43.0, 43.3, 43.6, 43.9, 44.2, and 44.5. COL 2.86".

I will perform OCW style test at 300m on Saturday to see which powder load the rifle likes best.

Thanks for all the comments/information.

Doug

Onewolf
January 26, 2013, 05:45 PM
Bad news and good news from today's SMK 142 load test. The bad news is that the heat mirage at 300 meters was unbearable. The good news is that it's late January and it was a beautiful (sunny mid/high 70s) day compared to the weather most of the country is experiencing. :)

I zeroed at 100 yds and then used my Strelok droid app to dial up the theoretical adjustment for 300 meters. Score 1 for Strelok theory. I was able to see the 300m 'sight in' target reasonably well which produced this group (the high/right shot was a called flyer):

http://www.onewolf.org/Files/IMG_5846.jpg

However the heat mirage got significantly worse and I was basically aiming where I _thought_ the target 'dot' was for the most of the subsequent shots and the results were ULGY. This is what the heat mirage looked like.

http://www.onewolf.org/Files/20130126_mirage.jpg

It's hard to tell but there are two white target sheets separated by about 1" with each target sheet having multiple 1" black round 'target' dots. The one thing I did learn was that the bolt got kinda 'sticky' at the max 44.5gr powder, but there were no other signs I could detect of overpressure (no flattened primers, etc). I would have moved to shoot from the table/benches to try to get above the heat mirage but there were multiple people already shooting/bouncing the benches.

Float Pilot
January 26, 2013, 08:13 PM
I have a Swede m/96 rifle that really likes the 130 grain Berger VLDs. Well it also likes the 120 grain Sierra SMK as well...
It does ok for a military rifle with open sights.


http://www.thehighroad.org/attachment.php?attachmentid=178485&stc=1&d=1359249141

Andrew Leigh
January 26, 2013, 11:28 PM
That's excellent shooting with open sights Float Pilot. I can't get that with a scope .......

Float Pilot
January 26, 2013, 11:48 PM
Even a fat old man can get lucky from time to time....Luck playing heavily into things these days.

My favorite rifle for target shooting is my Swedish CG-63 in 6.5x55mm. This one has a ground off original serial number and it was re-serialed when they made it into a CG-63. They are called a scrubbed serial number...
So I call her OLD SCRUB....

She has a GF rear aperture sight and a Elite front sight. She is also an odd-ball since she has a 1 in 9 inch twist rate barrel.

http://www.thehighroad.org/attachment.php?attachmentid=178502&d=1359261772

http://www.thehighroad.org/attachment.php?attachmentid=178503&d=1359261998

hueyville
January 27, 2013, 01:59 AM
Back as the Bush 1 ban was about to go into effect I almost freaked as bad as folks have done recently. Problem I did not have my M1A collection rounded out. Found a big time Springfield dealer in ATL with great stock. Bought the three I really needed and headed back north to the foothills. Was on phone with a friend who was a big H&K fan. He had never shot an M1and I was.itching to see how they shot. He had decent 100 yard range with bench so I drove the extra 20 minutes to his house. When I bought the rifles they cut me a deal on three 1,200 round "white box" U.S. surplus ball ammo.

I pulled up to the bench, opened the boxes and laid them out on the tailgate of truck. He had this dumbfounded look and all he could say is "no scopes." I was wondering what the deal was, apparently ur had never shot 100 yard paper with iron sights. I set the "basic" model on the bags first. I ran a brush then a patch through the bore and fired one fouling shot. Settled into the bags and fired a 5 shot group that was 7/8" center to.center. He was stunned. Did the same thing with the national match and.super match. With surplus ammo and iron sites they both settled into 1/2" five shot groups. I then offered to let him take a turn. He fired one group that was 2.25" with the best rifle and.would not shoot the M1's anymore. He went and got his H&K with glass and some premium ammo. He shot right at MOA. I took a try and his rifle shot about a half inch for me. He still thinks I rigged it somehow. Iron battle sights can't shoot half MOA with surplus ammo. I was stunned as he was a prolific.shooter and usually shot well. But more I thought, realized he had glass on every rifle. Since then learned the art of iron sights is dying with most of today shooters. Rifles come with glass so he uses it. Hated to tell him good rifles shoot well without glass. Hated to show w/out glass but thought it was common knowledge.

Onewolf
February 3, 2013, 01:23 PM
I think I have found a load that my rifle 'likes'. Based upon a previous powder load test it seemed like the SMK 142 with 43.0gr H-4350 at COL of 2.805 showed promise so I shot two 10 round groups with this load at 300 meters this morning. Since some people seem to think that 3 and 5 shots groups are too small to accurately determine the viability of a particular load so I did 10 shot groups. This result is 'good enough' for my purposes for now to have confidence when I pull the trigger that the bullet is going to do what I think it is going to do. :) Now I need to start learning how to read the wind. :eek:

http://www.onewolf.org/Files/IMG_5850.jpg

http://www.onewolf.org/Files/IMG_5851.jpg

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