6mm ARC - "Optimum 6mm" & Powders & Lapua Brass
#23
Converted 200 Starline 6.5 Grendel brass with no issues using my Hornady 6mm ARC Custom dies (2 die set).  My process as follows:

1. Anneal brass straight from bag.
2. Size on Lee Loadmaster using concocted alcohol/lanolin mix lube. 
3. Wash using Dawn & pinch of Lemishine to remove lube, rinse, fan dry.
4. Trim to 1.486-1.488" on my Forster Classic trimmer w/24 pilot.
4. Prime, charge, seat bullets.

NOTE:  During the sizing I left the decapper & expanding button in the die, had no issues.  Neck tension is very good, calipers measured the openings at average just under .243"  Seated bullets CAN NOT be pressed in nor did they change during feeding tests hand cycling or via bolt release.  Hoping to get out for 1st testing soon, loads are Nosler 70VG w/8208 & 105 RDF w/748.

I also tested resizing some un-annealed cases, took a little more pressure on handle  when doing the bump and shoulder springback was evident, more variation.  Pre-annealed cases shoulder bump was MUCH MORE consistent and WAY LESS force required on the press handle, almost effortless, virtually no springback occurred.

Just a quick note, I had to pull some of the RDF's because I overcharged them (scale battery was dying out) and using a kinetic buller just wasn't cutting it, ended up using a collet puller, but had to use a 22 cal collet until my 6mm collet comes in Undecided  Not worried about the marks left on bullets, only going to be used for pressure testing.
Reply


Messages In This Thread
RE: 6mm ARC - "Optimum 6mm" & Powders & Lapua Brass - by r.tenorio671 - 09-16-2021, 03:25 AM

Forum Jump:


Users browsing this thread: 3 Guest(s)