AJC1
Member
It appears that this is a well known recipe, 42.5 grains 4064, fed lrp gmm and a 175 smk set to 2.800 oal. Has anyone recreated these and had good success. I dont have the exact primer so I'd have to sub in 300 ccis or br2s.
I was actually just going to start messing with 175's and 4064 in .308, perfect timing on the thread! 43.2gr 4064 with a 168 smk in Winchester brass and a Fed 210 was what cloned the FGMM 168's for me. Definitely going to have to put 42.5 with 175's as one of the steps on my ladders now!
Starline is supposed to be about the same case volume as LC so that is another iteration. I would suspect it to run the same velosity about half to a grain less.I have gone up the ladder from 40.5 to 43.5 in .1 increments and all of my groups in the 42 were excellent... using the 175 smk and IMR4064. I did not use a chronograph then. My entries have confused the hell out of me on my spreadsheet so I plan on doing it all over again with the chronograph in the coming months. I use a Rem 9.5 primer with new Starline brass cut to 2.005 and COAL 2.80 give or take a 1000th or 2.
The 178 eldx is a good bullet no doubt. I have no love lately for hornaday due to their politics. My match bullets are a 224 80 grn eldm and a 6mm 108 amax. I'll find an alternatives.I’ve had just as good accuracy at 100 yards with the 168 grain Amax from Hornady as I did from the 175 gr Sierra. Three different 3-shot groups averaged 1.1” with the best just over 3/4”. That was not with IMR 4064, but the projectile seems sound. I might try the 178 grain ELD from Hornady too as the 175 gr SMK has risen steeply in price. So have the Hornady offerings but the total is still less locally.