I emailed a guy that did an article about the 6.8 SPC not so special, Nathaniel Fitch. I told him I had hand loaded a 100 gr bullet and had gotten over 3000 fps out of my 16" AR Performance with the SPC II chamber 1:11.25" twist 5R rifling. He just emailed me back and said it's too over pressured and to stop using it. I quit using it because I did not like the group as well as some of my other trials, not pressure. IIRC I had very little pressure signs but had dropped down just a bit to get a better group size. Now I can't find the info I had about the chronograph on that load.
It's a sad little article put out by The Firearm Blog (link: http://www.thefirearmblog.com/blog/2015/04/04/not-so-special-a-critical-view-of-the-6-8mm-spc/ and in the email he said he uses Silver State Armory ammo, and he told me to stop using that round as it would blow up on me.
I am pretty careful with my hand loading and usually test 1 bullet on something that looks a bit beyond recommended. Even at that I noticed no major swipes, nor flattened primers, nor excessive bulged cases. Barrels (with their unique chambers) are all as different as trees. No two are exactly the same, or else we would find the one true "Holy Grail" of hand loads, pass it along to each other and life would be good.
So inquiring minds (me) would like to know. I could swear I got that fps out of a 100 gr bullet, but without anythhing written down I might have dreamed I did.
It's a sad little article put out by The Firearm Blog (link: http://www.thefirearmblog.com/blog/2015/04/04/not-so-special-a-critical-view-of-the-6-8mm-spc/ and in the email he said he uses Silver State Armory ammo, and he told me to stop using that round as it would blow up on me.
I am pretty careful with my hand loading and usually test 1 bullet on something that looks a bit beyond recommended. Even at that I noticed no major swipes, nor flattened primers, nor excessive bulged cases. Barrels (with their unique chambers) are all as different as trees. No two are exactly the same, or else we would find the one true "Holy Grail" of hand loads, pass it along to each other and life would be good.
So inquiring minds (me) would like to know. I could swear I got that fps out of a 100 gr bullet, but without anythhing written down I might have dreamed I did.