Re: 7mm Rem Ultra Mag loads
Here goes Pop. I'm not going to state exact velocities due to discrepancies with shooting chronies. I will tell you this I subtract 50 fps from all my numbers before I post here.
140 grain nosler BT
Rl25 up to 96 grains was max in my rifle
Average velocity was 3500 at max loads.
140 grain Accubond
best accuracy for me came with 91 grains H-1000
giving nearly the same velocity as the BT
140 Barnes TSX
89 grains of IMR 7828 worked good
only got around 3350 out of this combo
160 grain accubond
90 grains of H-1000 was a good performer but I have yet to try Retumbo with these.
3350 average velocity
160 grain barnes TSX
2 powder choices here H-50BMG at 102 grains and H-1000 to 90.0 grains. HAve not tried retumbo here yet either.
Velocities in the 3300fps range
168 grain SMK
Retumbo to 94 grains, H-50BMG to 100 grains
average velocity was in the mid to high 3200 fps range with Retumbo and mid to high 3100 fps with H-50 BMG
I will have some more data in a few days with the surplus WC872 powder and Ramshot Magnum and possibly more Retumbo data.
A few notes.
#1 H-1000 and Retumbo are cooler burning than the BMG powder partially due to the decreased amount you burn.
#2 RL25 is a decent performer in my rig but only on the lite bullets and seems to produce more powder fouling.
#3 If your throat is as long as most of them including mine just load to fit your magazine because you will not be able to get near the rifling. My gun has proved more accurate with the magazine fit on most all hunting bullets anyway.
#4 as always the loads I listed are max in my rig so work up to them carefully.
#5 I used Rem 9 1/2 M primers for nearly all these loads except one I used CCI 250 primers. They all shot half MOA groups or better from my gun at 100 yards by 3 shots and if you let it cool after the 3rd you can put 5 into that measurement providing your not like me and botch #4 or #5 shots.
#6 If your thinking of shooting some Wildcat bullets I have some loads for them also and will have more this weekend with the WC872 powder.
Hope this helps you at least a little! [img]/ubbthreads/images/graemlins/wink.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]
Guns and ammo, what more do we need?