Ramshot Big Game powder

[Buckbrush]

Has anybody been using Ramshot Big game powder in 30.06 with 165gr btsp boolits?
Hornady list 58.3 gr as max and hogdon lists 54.0 gr as max. I did some latter tests with it
And I'm up around 59.5gr and just starting to see a little flattening of the primers. Velocity is 2960 avg for 4 shots. Had good groups with 165gr interlocks with 57.5gr velocity was 2830 avg If I remeber correctly. Then I switched to speer 165gr btsp and loaded up from 57.5gr to 59.5 gr from the hornady to the speer the groups moved up around 8 inches.
I'm not seeing and hard bolt lifts or ejector marks and no catering around primer strike.
Rifle is a brand new 22" xbolt in maple. Just wondering if anybody else is using this powder
And where they are at with it. I tried AA- 4350 very good acurracy but only getting 2700 fps with the 165's

[MT Gianni]

I ran out of IMR 4064 and went to using it in the 308 with 165 gr bullets. I got 1 3/4 lbs in a swap a while back. Accuracy was good but I didn't deviate from the new Western Powders book. I am really surprised to see that large of a group movement with only changing brands of bullets. I find a 2" movement rare with the same weight different brand, though I try to keep bearing surfaces similar when buying bullets.

[Buckbrush]

Thanka for your input. The Ramshot powders are the only thing I have been able to get with out paying Gunbroker prices. I have found the same thing with Ramshot hunter in the 270win you can really go quite a bit over book max. But it has me nervous what a safe load seems to be and all the sudden blown primer or worse. I would guess the bearing surface between the Hornady and Speer 165gr Bullets would be close but I guess I should actually compare them. It had me a little surprised at the amount of impact shift as well. Anyway I think they make good powder just haven't seen the reloading information from 1 source to the next be so far apart. I was thinking maybe they were taking in account of older Springfield and other military rifles that won't hold as much pressure. But I don't know.