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[lamrith]

What are you looking to do? Do you want to go beyond 700 or do you just want something different? Are you doing a full custom or just want a factory offered rifle/caliber?

Would like to go to 1000. And it will be a full custom.

I assume you just mean to ring steel or target shoot to 1k?  Grendel is good out to 1200+, but it's effective big game hunting range is <500yrds.
Trajectories for grendel are very very similar to 308 but with low recoil and less $ in powder and bullets.  The numbers I ran show grendel being about .10-20/round cheaper.  Recoil on mine seems no stronger than a regular 223/556 AR.

Hornady ballistics for ammo and velocities I am seeing is attached.

[yorketransport]

The only way you're going to keep up with your 270 WSM is to go to a bigger case. The Grendel/LBC is a neat cartridge and hard to beat if you're sticking to an AR-15 style gun. If action style doesn't matter though, the Grendel couldn't keep up with the 270 WSM past 700 yards with a 2 day head start and an act of God!

If you want to keep it easy to shoot without a brake you'll either need to go with a heavy gun or a smaller caliber. I'm not exactly recoil shy, but I can shoot a 13# 6mm BR a lot better than a 10# 300 WSM. It's extremely hard to be consistent (which is the key to any precision shooting) when you're getting rocked out of your shooting position at every shot. If you want to keep the gun at a packable weight (>10# for me)  I'd look at the 6.5x284 Norma. I'm partial to the original 284 Win but the 6.5 version is arguably better. If weight isn't a big concern then go big!

If factory ammo or components aren't an issue, I have a 270 Ultra Mag reamer sitting in my drawer. Run that into a 30", 8" twist barrel with the Matrix 165gr bullet at 3400 fps and you'd be good to go! If you want fast, my 270 ultra moves the 140gr bullets at over 3600 fps. It's a shame that the BC isn't better on those bullets.

Andrew

[Biggerhammer]

DANG GINA!!!!!

A 165gr .277 Matrix at 3400, makes a .264 Win Mag rate right there along with a Daisy " Red Rider ". 

[rudysts]

If your gonna go full custom its hard to beat a 7mm for long range shooting why not go with whats dominating F class 284 shehane or maybe a 280AI. both are non magnums so recoil wont be a factor. I am currently waiting on a 280AI barrel and hoping to push a 168 berger to 3000 fps or close to it.
For long range shooting I prefer a brake on my rifles so I can spot my shots and make my corrections. you just need some hearing protection.

[mountainman]

I think you will do great to stay with the old classic 264. Modern powders and projectiles make for an amazing combo. Some may comment against it here, in part they want to burn more powder in a bigger case for not so much improvement, or just because I personally think it's a great round and they just want to argue against for the sake of . ..
It will be your gun, go with what you want, be it a Grendel or the Win mag. Its your Money and your gun, right?😊

[Biggerhammer]

Run the numbers, money is way better spent else where. It isn't the late 60's. 😉

[lamrith]

.719BC??!    yikes.

[Curly]

You should also consider the 6.5-06AI.  It should get similar velocities as the 264WM but with less recoil.

[jasnt]

I will hunt with the gun so I don't want it to end up to heavy. Also absolutely will not but a brake on it. Had one on one gun and my ears rang for a week after shooting a deer. I fine with some recoil. I see Nosler came out with a new  142 grain ABLR in the .264 with a BC of .719. Thought I might have something decent pushing that out of the .264 win mag around 3100 FPS?

youll get much more accurate results running the g7 bc instead of the g1

G1 BC's are for flat base bullets. G7 are for boat tails, it will make a difference past 500 yards.

[Biggerhammer]

You should also consider the 6.5-06AI.  It should get similar velocities as the 264WM but with less recoil.

  A abundance of brass, standard bolt face and lower pressures. What's not to like?

[rudysts]

You should also consider the 6.5-06AI.  It should get similar velocities as the 264WM but with less recoil.

  A abundance of brass, standard bolt face and lower pressures. What's not to like?

definitely considering this for my next build. 6.5-06 AI