300BlkTalk

A commonly-reported phenomenon in centerfire rifles is that new barrels "speed up". In other words, velocity with a given load tends to increase over the first 100-200 rounds in a new barrel (the velocity increase seems to be either negligible or not commonly reported in chrome-lined or me...

So one problem was a stiffer than necessary buffer spring. I went to a standard spring and now OAL growth is down to .002" (from an originial 2.100" OAL). After a little more research, I came across the following article from Sierra Exterior Ballistics: Reloading for Semi-Autos and Service...

Just getting started to load the TNTs, and cranked out a few dummy rounds to function check in the intended hosts (two different AR-15s) before live testing. Every time I dropped the BCG to chamber a round from the magazine, the OAL grew .004"! The brass is virgin Starline. Brass prep as follow...

I think one or both of the following possibilities are the cause of your troubles: First, Dellet hit the nail on the head about your handloads. Brass can have a huge impact on accuracy -and through other mechanisms than velocity. Variations in neck wall thickness, neck tension, non-uniformity, chamf...

Hello. I've been reading the forum for weeks and just joined. I'm really impressed with the knowledge base here and looking forward to learning and contributing. I have a handloading question, so as this is my first post, I'll give some background: I've been reloading for years, but only for 45 acp....