Short throat Grendel chamber

[Daddycaddie67]

I recently bought my first AR, an Alexander Arms hunter in 6.5 grendel. The problem im having is that it has a very short throat, so much so that I have to seat a 95 gn. Vmax to 1.190” to just touch the lands. Hornady‘s data for the 95 vmaz has a coal of 2.30 and Nosler uses 2.260 for a 90 gn. Im using 8208xbr and any charge over about 28 gns. will seat longer than 1.190” (very compressed load)
Does any one know of a powder that will allow for more case capacity and have data ? I thought I read somewhere that Leverrevolution would give more case capacity but I could be mistaken. In the mean time I will call the manufacture monday to see what gives on this chamber.
If anyone has any suggestions or can shine some light on this please speak up. Thanks as always, E

 

[Bill Rodolph]

Your saying there is over an inch of difference in what the book says and what you are able to do? Are you getting a false reading on a carbon ring maybe? But still, huge difference. You might want to have your gunsmith look at that. Something is not right.

 

[Dusty Stevens]

Im betting theres a bur or some other defect in there

 

[Sandstorm]

If in fact your chamber really has a super short throat..I think a
Uni Throater kit from PTG will fix you up...but Dusty would know more about this than me
Im not a machinist...but think you can do it yourself...Call them

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[Daddycaddie67]

Yeah, my numbers were off, dyslexia is a bitch. That should be 1.990 not 1.190. Also I checked the chamber with a bore scope and all is well there. I’ll edit the original thread.

 

[Sandstorm]

Man i love the Grendel...Its a super little round.
Enjoy my friend.

 

[Daddycaddie67]

Looking at the burn rate chart Leverevolution is way too slow, to have less powder in the case should I be looking at say N130, H322 etc.?
I’ll look into the uni throater, but if it came to that I would probably replace the barrel. E

 

[Sandstorm]

My favorite loads are with TAC and AR-Comp...but 8206XBR I hear works well too.
8208 is not for me however...
H322 should work..I think I used it a long time ago.....CRS

 

[EBaker]

I had the same issue with a AA barrel I purchased. Took it to my gunsmith who throated it with a gig he had made to fit precisely the AR upper. Did it by hand and opened it up appropriately. 050. Once he did that, the rifle with shoot under 1 inch at 100 yds with 123 SST and CFE223.

 

[dttheliman]

LvrRev 30.8grains under a 130eld-m, just barely fits into mag - 2590fps goes subsonic at around 920 yards, holds reasonable (for a gasser) accuracy out to 800 - 1moa , 100to 300 it’s .3 to .5 Moa, never tried with any other bullets - IIRC it was not compressed at all