This last two years i have been shooting plainbase in 30 calibers much more than gas checks.Now i am concentrating on the 7.62 x 54 Russian Mfg 91-30 rifles with good bores (scoped,but in orig stocks) to see how well they can do.Having gone though many designs lately,i have now focused on the ideal 311259 200g “Stop Ring” Hudson bullet and a 190g Modern Bond Semi spitzer affair,both with either 8.5 of Unique or 11.0 of Trail Boss and pistol primers.It seems for every 1” group there are as many 2” groups.I am always seeming to battle bore condition issues that seem to be lube and carbon with a very very light leading sometimes visible.(Three GC loads clean it out perfectly while a brass bore brush and Eds Red still leaves a little crud in the bore) Alloy has been from 10 BHN to 20 BHN with no apparent correlation to accuracy.Velocities are held to roughly 1200 FPS and SD's and ES's are very uniform.This last three weeks i shot 17 five shot groups and one ten shot group at 100 yds with the 311259,11.0 of Trail Boss,Fed 150 primer.Smallest group was 5/8” and largest was 3.5” for an 18 group average of 1.62".Am i fighting an uphill battle tricked by the good groups,will i find the magic combo,or is this accuracy as good as i should expect?
Actual groups.
.625 1.0 1.375 1.25 1.125 2.25 1.625 1.875 1.375 1.55 2.0 1.375 1.0 1.55 3.5 2.25(10) 2.0 1.625
George