155 SMK in Larue OBR
- Thread starter rtr
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Re: 155 SMK in Larue OBR
I have run 155 gr amax bullets with 45 grains of tac and gotten 2750 bt they show slight pressure. The primers are raised around the primer strike a little.
The load I have settled on for now is 155 gr amax on top of 44 gr tac at 2.810 oal with a slight crimp. I get 2670 fps, no signs of pressure, and always sub moa.
I am running an 18" larue obr and the temp was around 80 deg when I chroned those loads.
For reference, 168gr fgmm was running 2524 fps and 175 gr privi match was running 2550 on the same day.
I have run 155 gr amax bullets with 45 grains of tac and gotten 2750 bt they show slight pressure. The primers are raised around the primer strike a little.
The load I have settled on for now is 155 gr amax on top of 44 gr tac at 2.810 oal with a slight crimp. I get 2670 fps, no signs of pressure, and always sub moa.
I am running an 18" larue obr and the temp was around 80 deg when I chroned those loads.
For reference, 168gr fgmm was running 2524 fps and 175 gr privi match was running 2550 on the same day.
Re: 155 SMK in Larue OBR
I too will be looing at 155s in an 18" OBR. How far out have yo shot this load?
I too will be looing at 155s in an 18" OBR. How far out have yo shot this load?
Re: 155 SMK in Larue OBR
46.0 of H4895 should do it. It gets 3050 from a 24 in Rem 5R, and 2900 from a 20 in Krieger 1-11 AR10. I have gone as High as 47.0 with LC cases before it looked bad. Somewhere in the 44-46 range should be right. This was in LC 04 Cases, with Wolf Mag primers, or CCI military ones.
A friend of mine runs heavy Palma charges of Varget through a KAC SR25 thats 18 in and has no issues getting them to 2800, I do not remember the load though, sorry. But a search of "palma" loads with Varget and the 155 should give you some ideas. The .308 page on 6mmbr.com has some good loads to use as a startpoint/reference.
46.0 of H4895 should do it. It gets 3050 from a 24 in Rem 5R, and 2900 from a 20 in Krieger 1-11 AR10. I have gone as High as 47.0 with LC cases before it looked bad. Somewhere in the 44-46 range should be right. This was in LC 04 Cases, with Wolf Mag primers, or CCI military ones.
A friend of mine runs heavy Palma charges of Varget through a KAC SR25 thats 18 in and has no issues getting them to 2800, I do not remember the load though, sorry. But a search of "palma" loads with Varget and the 155 should give you some ideas. The .308 page on 6mmbr.com has some good loads to use as a startpoint/reference.
Re: 155 SMK in Larue OBR
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rtr</div><div class="ubbcode-body">I'm trying to get this bullet over 2700FPS in my 18" OBR because the BC is supposed to be better above 2700.
Has anyone been able to get that much velocity? If so please share your load, thanks.</div></div>
don't sweat it, the bc's are only a mathematical representation of the real world after all. The bc will decline with velocity so from a mv of 2720 the next lower 'step' bc may give you a better prediction? Alternatively the g7 bc will be pretty constant.
More mv is better than less but you may end up sacrificing other things for the sake of a limited benefit.
Just a thought, and on reflection I should probably take my own advice!!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rtr</div><div class="ubbcode-body">I'm trying to get this bullet over 2700FPS in my 18" OBR because the BC is supposed to be better above 2700.
Has anyone been able to get that much velocity? If so please share your load, thanks.</div></div>
don't sweat it, the bc's are only a mathematical representation of the real world after all. The bc will decline with velocity so from a mv of 2720 the next lower 'step' bc may give you a better prediction? Alternatively the g7 bc will be pretty constant.
More mv is better than less but you may end up sacrificing other things for the sake of a limited benefit.
Just a thought, and on reflection I should probably take my own advice!!
