Last night while at the bench

[Buck2732]

Last night while reloading for my .303, I was reminded about how efficient the small Grendel case is. This was prompted by the fact that to get my .303 to 2550 fps with a 125gn pro hunter by sierra I have to fill the case with 46.5gn of re-loader 15.

This is 100fps slower than the 129SSTs I use when stalking, again re-loader 15 but only 30gn. Please note this is in my bolt action and probably not be used in an AR.

[KentuckyBuddha]

The point remains it is a graphic difference in efficiency of the case. I would pick the latter over the former in a "mad minute"! ducwidt boom : )

[LRRPF52]

I love how I only suck-up 31.0grs of powder with the Grendel per case, versus over 40.0grs with my .260 Rem, or up to 63.0grs with my .270 Winchester. It certainly is a very efficient chambering.

[KentuckyBuddha]

Plus, you get way more than ~75% or ~50% of the performance from it respectively!

[V Maxed]

I had a similar epiphany the other night when I very sadly realized I only get about 70 rounds from 1 pound of powder fro my 300 RUM!

[Overwatcher]

And in a lightweight autoloading platform! It always blows me away when I go out and shoot my Grendel with my. 223 or 6x45 and see the difference in power in the same platform.
A whole different world for the Grendel.

[LRRPF52]

And in a lightweight autoloading platform! It always blows me away when I go out and shoot my Grendel with my. 223 or 6x45 and see the difference in power in the same platform.
A whole different world for the Grendel.

Roger that. The projectiles forget where they came from once they are thrown into the air, and just keep going.

[mongoosesnipe]

considering the Grendel has about 72% the bore volume of the 303 the efficiency is better exemplified comparing the powder to the percentage of bore volume so 64.5% the powder with 72% the bore that and the medium to big 30s are not very efficient with bullets under 150 grains