I find it interesting that Hornady list the same maximum velocity for the 108-110 bullets using H4895, IMR8208XBR and Varget at 2400 FPS out of an 18” 6 ARC AR-15. The CFE223 and Leverevolution show the same velocity of 2575 FPS out of an 18” barrel. The CFE223 powder appears to be the more efficient with 29.1 grains whereas LVR needs 29.7 grains to get the same velocity.
H4895 and IMR8208 max out at 25.2 and 25.3 grains of powder with the same 108-110 grain bullet. With 175 FPS velocity advantage I think CFE223 would be worth testing in various temperatures. It would be intersting to see if CFE223 looses approximately 1 FPS per degree as has been published.
The difference in volume and bore diameter could have an effect on temperature sensitivity because there appears to be a different pressure curve between the 6.5 Grendel and 6 ARC. Will the slightly less case capacity of the 6 ARC and pressure curve affect the temperature sensitivity of CFE223. The main factor to me involving temperature sensitive powders is the change in zero in cold temperatures compared to warmer temperatures where I do most of my shooting. I don’t hunt enough at longer distances for the change in velocity to have a significant effect on bullet performance in the target.
H4895 and IMR8208 max out at 25.2 and 25.3 grains of powder with the same 108-110 grain bullet. With 175 FPS velocity advantage I think CFE223 would be worth testing in various temperatures. It would be intersting to see if CFE223 looses approximately 1 FPS per degree as has been published.
The difference in volume and bore diameter could have an effect on temperature sensitivity because there appears to be a different pressure curve between the 6.5 Grendel and 6 ARC. Will the slightly less case capacity of the 6 ARC and pressure curve affect the temperature sensitivity of CFE223. The main factor to me involving temperature sensitive powders is the change in zero in cold temperatures compared to warmer temperatures where I do most of my shooting. I don’t hunt enough at longer distances for the change in velocity to have a significant effect on bullet performance in the target.