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I have been able to get my 30-06 loads to 3/4\” at 100 yards, but not so lucky with 350 legend. Loading the 147 Gr truncated RMR match-winners, my most consistent group was a 1 3/4\”X1 3/4\”X1 3/4\” triangle from 50 yards. The load has a COAL-2.1135\” w/27 Gr Hodgdon\’s Lil\’Gun, uniform starline brass, Winchester small rifle primer #41, I was wondering if modifying my powder charge can tighten this to a perfect group. I want it to be under 1 MOA!
I was getting MOA groups with Browning 124 Gr RN. Last week I fired Winchester FMJ, and it was pretty sloppy like 6\” group. I ordered a bipod to steady things up, so I will have to test some factory loads a bit before reloading more. I will get back to this next week sometime, thanks for the help.
A change in primers may help but I doubt it will shrink groups by half.
Have you measured velocities with a chronograph?
I don\’t have a chronograph sorry. It will be several days until I can try anything different to confirm issues. What I will do first is put a bi-pod on it to uniform my aim for every shot, and test factory ammo. After that I will load some of what I was loading with winchester primers, also CCI primers, and some Federal Gold Medal Small rifle primers.
Make sure your powder drops are consistent. Neck tension is also something that affects groups.
One thing at a time though. Shoot some factory loads with the bipod and use that as a baseline. Next try swapping primers and making sure the power charge is within .1 or .2 grains.
Make sure your powder drops are consistent. Neck tension is also something that affects groups.
One thing at a time though. Shoot some factory loads with the bipod and use that as a baseline. Next try swapping primers and make sure the power charge is within .1 or .2 grains.
Sorry, life has turned into a marathon. I did my test with the new bi-pod from 50 yards.
Factory Load Test:
Winchester FMJ 147 Gr gave a 1/2\” group with a 1\” flier.
Browning 124 Gr rn FMJ gave a group 3/4\” with a 4 inch flier.
These groups are from hole center to hole center, so you can halve them to find distance from bull at 1/4\” and 3/8\” off target.Hand Load Test:
I used a COAL that was on my die from last attempt(2.1.15\”) just to see the difference between (small rifle): Winchester #41, Federal Gold Medal #GM205M, CCI #400, and Fiocchi. Here are the results: Winchester: 2\” with 3 1/2\” flier, Federal Gold Medal: 1 1/2\” w/3\” flier, CCI:3/4\” w/2\” flier, Fiocci: 2\” w/2 1/2\” flier.It appears the CCI primers might be the best of the lot. Every 3 shot group had a flier, so I\’m not too confident that my barrel isn\’t slightly defective. There is an extractor gouge sometimes, and some stove-piping with the rifle. I guess my first issue might be to solve the failures with my 350 legend.
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