05-07-2018, 02:55 PM
StoneHendge Wrote:What sort of velocity are you getting with Varget? I just cross referenced Hodgdons 6mm BR data with Whitley's and all of Whitley's data has higher charges than Hodgdon's max charges for the powders they both list. I've been on a roll elsewhere with Benchmark and Hodgdons has 6mm BR data for Benchmark. Might give that a whirl.
The Berger Load Data is more powder extensive and comes closer to what Whiley's got listed. Whitley says for the 6mm AR 27.8 of H4895 for the Berger 105's and Max for the the 6BR is 28.3 H4895 according to the Berger Manual, so fairly close. The 6BR has around 1.5-2 grains more H20 that the 6mm AR depending on what brand cases you happen to measure. The Hodgon Data seems to be more conservative.
I'm not going to hijack Zeus's thread with velocity since my barrel is different from yours or his. Out of a 20" barrel with a 95 TMK Varget I'm already faster than the 6BR H data and right on with the Berger data taking in consideration the barrel length and less powder. I double check the results with Quick Load, it has 6mm AR in the data base. If you are getting more than the Max Vel. of the 6BR you are probably at or very near the danger zone. Whitley's Chrono results for the 26" Hart barrel are right there + some fps. compared to the 6BR, his load is probably a little hot as that's how those Match Rifle shooters load em and don't let them sit in the chamber too long.
There are a lot of powders suited to the 6mm AR/Grendel (whatever you want to call it) it just depends on how much time and money you want invest in working up a load (and barrel life).