10-31-2021, 09:45 PM
I had been running 2446 with 105 RDFs with 26.8 gr of Varget in a Hornady die sized Starline 6.5G case (16" Lilja).
Multitasking since I put the barrel on a different build and need to zero the scope, I strapped on Magnetto and started at 25 yards with a just cleaned bore. First three at 26.5 gr were 2453 sd 3 es 7 and touching (albeit at 25 yards). I pretty much called it a wrap with the testing at that point given the few extra fps a just cleaned bore gives. Made a windage adjustment and did the 3 at 26.6 which were a few fps faster (didn't write it down) just to have it ready for 50 yards next outing. Off to the puller for the remainder.....
I'm pretty surprised that it was as much as a 0.3 gr difference, but hey, that's 3 more rounds per pound! Good data point for anyone doing load development with virgin brass for when they switch to fired brass.
Multitasking since I put the barrel on a different build and need to zero the scope, I strapped on Magnetto and started at 25 yards with a just cleaned bore. First three at 26.5 gr were 2453 sd 3 es 7 and touching (albeit at 25 yards). I pretty much called it a wrap with the testing at that point given the few extra fps a just cleaned bore gives. Made a windage adjustment and did the 3 at 26.6 which were a few fps faster (didn't write it down) just to have it ready for 50 yards next outing. Off to the puller for the remainder.....
I'm pretty surprised that it was as much as a 0.3 gr difference, but hey, that's 3 more rounds per pound! Good data point for anyone doing load development with virgin brass for when they switch to fired brass.
#FJB