I've been doing some testing with my 6x47L with hybrids, is everyone jumping them? Ive only tested 10thou jam and 15 thou jump but nothing stellar from it. Do I need to goto 20thou or even 40thou?
I'm seeing some very interesting results playing with seating depth with 105 hybrids and 105 a-max's in my new 6x47L. First loads I made for the new build, I was jumping the Bergers .050 and shot some very tight groups doing barrel break in. Ran ladder tests and settled on 40.5gr of H4350 going 3065fps out of a 1:8, 28" Bartlien. Loaded some more rounds with different seating depths and got some interesting results.
Shooting five shot groups at 200yds, consistent 2-4mph wind, shooting most shots when the flags dropped. All brass (6.5x47L) full length sized, necks turned, then once fired, and ran through a full length Forester die, bumping the shoulder 0.0015. Powder charge of 40.5gr H4350, CCI-450 primers. Results:
.002 off the lands- groups where ~1" vertical, 1.25" horizontal (looked like wind was stringing the group).
.010 off the lands- groups where ~1" vertical, 1.8" horizonatal (stringing left and right)
.020 off the lands- groups where ~0.75" vertical, 2" inches horizontal.
Original load (same wind conditions, same timeframe, same range session)
.050 off the lands- .5" group vertically and horizontally! This has been repeated in even a 5mph wind at 200yds.
Next need to test .030 and .040 to see if it tightens up or shows some sort of trend. The 105g A-max's were showing very similar results when I varied the seating depths. I've read that seating depth might be displayed in horizontal stringing of shots, but most chalk that up to shooting form and wind. Any thoughts? Anyone else had similar results with any cartridge?