02-24-2016, 10:44 AM
Final weight with the Vortex Diamondback HP for testing is just under 10lbs with an empty mag. The rifle has impressed me so far. One of the AR Stoner mags has produced stove pipes twice. Outside of that brass is landing about 3 o'clock and in good shape. First round of load testing was to find most accurate group based on charge. 28.5 was to high. Had one heck of a time running that brass through the resizer. 28.1 was best group from that test with 1"-1-1/2" group. Brass was just resized a third time and primer pockets are looser. Otherwise brass is in beautiful shape and as of now has not been trimmed once. Using AA recommendation of 1.52" brass length, all fall short of that length. One close but rest well short. If primer pockets hold up I may stick with Hornady brass but Lapua is calling my name. Lol. The 6.5 Grendel is definitely a sexy little cartridge and look forward to chronographing my final accurate load and sending some down range. Next test I am mixing in some 123 Scenars. Hope to get lucky using similar oal's. Note: I use the Hornady comparator tool going off the ogive and oal's listed above are second measurements based on loads developed with the comparator tool.
On a side note I've been doing load development on the 69 grain Sierra TMK in 5.56 and extremely pleased with the results thus far. I should be getting enough velocity out of them to stay supersonic to 720 yards at my elevation.
On a side note I've been doing load development on the 69 grain Sierra TMK in 5.56 and extremely pleased with the results thus far. I should be getting enough velocity out of them to stay supersonic to 720 yards at my elevation.