Nato 5.56 Questions
Awhile back, with the help of this forum and all ther great people here, I started reloading .223 brass for my AR-15. Did my ladder tests using Varget powder and 55 grn bullets. My powder range was from 23.4 to 26.4, and again with the help of this forum was able to find a powder charge that with the 55grn bullet was a good match for my rifle. Now comes my problem, I bought 1000 new Lake City 5.56 brass cases. Wanted to do ladder tests to determin what powder charge of Varget and a 55 grn bullet would work best. Here are the problems I ran into;
1- When loadind up rounds with Varget powder, going from 23.4 to 26.4 in .2grn increments. I could only load up to 26.0 grn as any more and the bullet would compress the powder. So I stoped and did the ladder test with what I already had made up.
2- While doing the ladder test, I checked each bullet fired for signs of over pressure and found none. But I did have powder marks down the side of the case from the mouth area.
Talking with the range master and a few of the old timers at the range, it was suggested that the Varget powder might be too slow of a burning powder for Nato case and the 55grn bullet and the case was not expanding fast enough in the chamber. And that I should try a slightly faster burning power or a heavier bullet ( 69 Grn was suggested).
I wanted to run this past you guys and see what you thought, and if you agree with the above would it be better to go with a faster burning powder or a heavier bullet or does it really matter. Sorry for the long winded story, but I wanted to give you guys all the details I could. Thanks