03-24-2023, 10:18 PM
(03-24-2023, 06:27 PM)grayfox Wrote: Guys, keep it respectful, even if you disagree.YOU ARE CORRECT IN WHAT YOU SAY. I'M GETTING 2768FPS WITH THAT LOAD IN A 20" BARREL AND 23 DEGREES OUTSIDE TEMP. I WANT TO BE CAREFUL NOT TO WORK UP LOADS AT THIS TEMP THEN FIND THEY ARE TO HIGH IN SUMMER TEMPS. HAVEN'T HAD TIME TO DO MORE LOAD DEVELOPMENT AS YET. MY 85 GRAIN LOAD IS RUNNING 2970 TO 3000 FPS WITH LVR AT 23 DEGREES. EITHER LOAD WILL DO WHAT I NEED DONE, NOW TO MESS WITH OAL TO FIND ACCURACY POINT.
By the way I am shooting some 107 Smk's in my 22", I did a quick check of using a 105 Amax with 30.5 Lever in a 20" bolt gun, got an estimated 2782 ft/sec but pressure only slightly over the gas gun limit (52Ksi), depending on your OAL.
An Amax can be seated longer than the 105 HPBT's of Hornady, plus Lever gets real good MV without as much chamber pressure as other, more commonly used powders.
So high 2700's in a 20" bolt gun, not out of the realm of possibility.