Rickc Wrote:Wonder what the velocity gain would be with an ackley improved grendelRun, or get a buddy to run, the 6.5 Grendel with a powder like H335 in QuickLoad. Do this at the suggested 50ksi for AR bolt happiness, then repeat at the pressure YOU THINK might be OK for your rifle.
My 6mm turbo 40 has a blown out shoulder of 40 degrees and a much shorter neck than the original grendel case
Suprised someone hasn't already done it
Then, morph the Grendel case into the configuration you are thinking about and repeat with the same. Pressure levels and powder.
You will have four muzzle velocities to plug into your favorite exterior ballistics calculator.
Do this and see what the cihange in wind drift at the ranges you are interested in. Is the gain more or less than 1 moa? 1/2 moa? Or 1/4 moa?
The answer combined with how well you believe you can shoot will tell you whether the exercise is worth the bother.
I have done exercises similar to this for a couple of wildcats and haven't yet convinced myself that the blown forward, blown out, higher pressure combiniation will make a real difference in my ability to hit at range.
Nonetheless, like any choice of cartridge, rifle, or bff, the resulting state of mind may be enough. Most of us will not criticize your chosen path if for no other reason than curosity to see how it works out!
VonGruff has done us a real favor by already having done the experiment. It definitely seems to have worked well for him and we learned a bit too.
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"To those who have fought and almost died for it, freedom has a flavor the protected will never know."
-- Author Unknown
"If at first you do succeed, try not to look astonished!" -- Milton Berle