I'm measuring 338 Allen Xpress Case volume using water and as an example a case holds 120grs of H2O and another holds 121.4grs and so on. My question is what increments are you sorting them into ? Are you sorting them into 1grs or 1/2gr or 1/10gr etc ?
Sounds like a great suggestion for measuring actual rifle headspace, I'm going to try that and see what I come up with for a measurement...and then maybe bump .002 down from that. Thanks, I'll post measurement.
Cases in question are 308 FC factory loaded ammo once fired in same bolt action rifle. Using a Wilson case gauge the 67 once fired cases measure as follows:
14 cases @ 1.630
27 cases @ 1.631
17 cases @ 1.632
2 cases @ 1.633
3 cases @ 1.634
2 cases @ 1.635
1 case @ 1.636
1 case @ 1.638...
Loaded up 10 rounds of 308 Winchester, Went to range, all fired w/o issue, no failure to feed, eject or stuck cases. headspace on 10 cases ranging from .002 above Wilson high step to -.0015 below high step. the average being .0005 above high step. I've been told the high step on the 308 Wilson...
102 pieces 30-06 brass, factory ammo once fired. Cases have been sonic cleaned, full length resized, primer pockets uniformed, 30 degree chamfer and polished. Also 100 Sierra 30 caliber, 308 diameter, 220gr RN bullets. $40.00 includes shipping-postal money order only. If interested please...
Shot the 5 rounds loaded to 105.0 gr. No ejector marks, loose primer pockets, easy bolt lift and extraction. Average 2966 fps for 5 rounds. Placing the case on tumbler did the trick as once loaded I was able to again hear powder shake. Great suggestion, thanks.
Not really hearing any powder shake. I think your right I'm probably right at 100%. I'll see what results I get with 5 rounds loaded to 105.0 but I'll probably stay around 104.2 as that should get me in at around 2950+fps and see what kind of grouping I get. Thanks for the input.