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Caliber advice

I thought it was recommended that 300 WM be barrelled in a minimum of 26 in. That's why I mentioned 300 WSM.
Will a short mag be more efficient than a long mag with a shorter barrel?
I do want to run heavy for caliber bullets.

The 300 wsm is a little more efficient, but benefits from a slightly higher saami spec psi.
The "issue" is the shorter barrels require faster powders. This means snappier powders. Some prefer the punch. I prefer the push and will take a 300 wm due to the slower powders used and is better at pushing heavies than the 300 wsm.
Everyone has their favorites. I'd gladly take my 300 wm for my do all rifle. Also thankful I'm not limited to 1 rifle. The 215 Berger makes the 30 cals something special.
 
I'm a 30 cal guy, ANY 30 cal magnum will do what you want, even with a 24" tube.........but a 338WM with a 24" tube will hit like the Hammer of Thor.
I also choose heavy for calibre bullets, so for a 338, 225-250gr bullets is what I would recommend.
I have a 338WM (3 separate rifles actually) and use 225gr Accubonds and 250gr Partitions in all 3.
Never had a failure to kill ANY animal with those bullets.

Cheers.
I would go 33 Nosler if $ no big deal.....or for less and about the same result/nearly the 338 WM 225 gr 600yd light gun.....good shot placement...done
 
I'm very much considering cutting my M77 down to 21", but the muzzle blast will get fierce.

Yes! This is a very real consideration. I've shot 30-06s with a 20" barrel and thought it wasn't pleasant. If you put any faith in the Houston warehouse shooting stories from back in the 80s, you should go to 21 3/4". Would be interesting to see if you could get groups to shrink any.
 
What's the old saying, the 300WM may not be the best answer, but it's never the wrong answer? I get it.. it's a great cartridge! Personally I'm a fan of not having more recoil than necessary because it affects my ability to shoot accurately when you start getting above a 30-06 or so. Whatever works for you. There is so many capable cartridges now, what cartridge to get is almost a pointless question. We should be asking "which ones shouldn't I get?"
I've always been a "recoil junky", I always figured it was because I was 6' and 140 lbs most of my life. So it "pushed" me more than hit me. Now that I'm back into shooting, I'm 180 lbs, so we will see how that goes. Recoil is a very complex topic though. For me, I don't even start taking extra breaths to pull the trigger until free recoil goes above 40 ft/lbs or so. Yet I had a cheap package Savage 110 in 7mm Rem Mag that left my shoulder looking like it was married to Bobby Brown lol

That 7 mag, and setting the scope on a guys 375 H&H Winchester Super Grade is the most I've punished myself. He was shooting it in a lead sled against my advice. He learned why, the gun cant move, so the scope moves in the rings. He gave me $50 to set it back up for him. LoL
 
Sounds like the 300 wsm would work well for you. I shoot one in my 1000 yard gun for compatition. If you use h4350 powder about 61 gr with a 210 if is very accurate and would work well from a shorter barrel. My comp gun has a 32 inch barrel and my hunting rifle has a 24 inch barrel and there is not much speed lost in that 24 incher. The 280ai is probably the single most versatile cartridge there is. I built 5 of these already and all shoot very nice. A 180 hybrid will hit almost as hard as a 210vld at 600 yards. The 280ai kicks considerably less in a light hunting rifle. Remember hits like a truck sucks if shot placement is poor. I'm doing more and more 6.5 creeds now. I use one in light gun at 1000 yards. It still has over 1200 pounds of energy at 700 yards. Out to 600 you really don't need to be picky there are tons of great new and old that can get it done with ease. Shep
 
I would pick a number of what you think is "hits like a hammer" energy (1200,1500,2000,2500lbs,etc) then list out the cartridges. From that list I'd pick the one with least amount of recoil. You will always shoot more accurate with the less recoil than with more. With today's bullets and powders there is no reason to shoot crazy recoiling rifles, especially if shots are inside 600yards.
 
The 300 RUM jumps to my mind first thing. Good thump for sure. If you want even more thump, consider the .338 RUM. As much as I love my .338 WM (which I've had since the '70's), if I were starting out today, I would start with the RUM's and never have to look back! I'm also very partial to Nosler Partitions, 180 or 200 in the 300 and 210 to 250's in the .338. Partitions always work! Plus there's the mono bullets that have a lot of potential. Hard to beat the combo in my mind.
Cheers,
crkckr
 
As far as caliber, I like 30 caliber cartridges and 7 mm cartridges
I still like cartridges with belts, but they don't have to have belts. I think a 30 Newton would be my first choice if I could get cases.
What do you want to do at 600 yards? Deer, targets, Prairie Dogs, Pronghorn or something else? If targets, or smaller game animals (White tail or smaller) I'd go with a fast twist 7mm that could push a 160 grain or heavier at 3,000 fps or a 30 caliber that could with a fast twist that could push a low drag 200 grain plus bullet at 3,000+fps.
 
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