Re: 308 Gas gun questions
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sawgunner2001</div><div class="ubbcode-body">That being the case, does repeated ejector swipes reduce case life significantly? Secondly, would it be wise to try H4895?
Honestly, I didn't look at the primers on the 43.5gr load. I saw the ejector swipe and called it quits. I'll unload the car and take a look at the primers...see what they say.
Thanks </div></div>
I am using IMR 4895 (not H4895, but somewhat similar), in my 308 LMT MWSE, and am currently testing 40.0, 40.5, 41.0, 41.5, and 42.0 grains, using Lapua cases, Winchester LR primers, and Sierra 175g Matchking bullets.
ALL the loadings between 40.0 and 42.0 work fine, with no pressure signs on the primers. It is hard for me to assess accuracy accurately, as I am still elarning to shoot this rifle, so cannot yet fire groups consistent enough to positively pick the "winner" in the ladder test,but ALL the loads are shooting betetr than I can. The ones that seem best are interestingly enough both the 42.0 and the 40.0 - the heaviest and the lightest in the test.
I also ran 3 range sessions in a row, the first with Federal Gold medal and the last 2 with the handloads, without cleaning the rifle. About 120 rounds total. During the 3rd session, the groups opened up indicating the rifle wnated cleaning, and sure enough, when I opened it up to clean it, both the barrel and the bolt parts were fairly dirty. However, the residue left by the IMR4895 handloads cleaned up VERY easily, using only M-Pro7 and NO copepr solvent required.
The IMR4895 weighs well on my Chargemaster. I have no idea how well or poorly it might meter from a powder measure.
I went with the IMR4895 because Zediker recommends it as a "can't go wrong" loading in his book on handloading for competition.
Jim G