Ideas for New .277 build

Gcan

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Sep 29, 2017
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It'll certainly impact barrel life, but for me at least, this is a big game hunting rifle that will not get shot much throughout the year. A good barrel will last many years in my application and the extra horsepower may be just what I need in a pinch to execute a difficult shot on a hunt that cost much more than barrels. ;) One thing I'm doing on all my recent builds is using Bartlein's 400 MOD harder stainless barrels which offer 75% - 100% increase barrel life to help offset the abuse of my overbores. (repeating myself from before)
Makes perfect sense. I like the 27 cal. Good luck.
 

Northkill

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What barrel length are you doing?
Was that question for me? I'm going 24" to keep it compact for mountain hunting. I know it's losing efficiency, but it's the price I'm paying to achieve my goals. Plus if I every screw on a can, I don't want it too out of balance...
 

codyadams

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I don’t know much about this round but seems to me 85/90 grains of H1000 pushing a 170 grain bullet thru a .27 hole at probably 3400-3500 fps is going to be hard on barrels. I’m running a 300rum with 215s at 3195 over 90 grains of H1000. And that is probably a 1000 round deal for barrel life. My last one was 900 rounds. This one has 600ish rounds thru it and almost .040”erosion. Still shoots great, but I don’t think it has another 600 in it. Isn’t the .27 going to be worse?
If you want good fuel mileage and long tire life, get a prius, a fiesta or something like that. Expect low bills at the pump and long tire life.

If you want to run a 10 second quarter mile or fly around a track, get a hellcat, Shelby mustang or something along those lines. Expect higher bills at the pump and short tire life.

If you want an economical cartridge to shoot 270 bullets slow, get a .270 win. Expect low powder charges and long barrel life.

If you dont care about cost and want to shoot 270 bullets fast, get a 27 nosler. Expect higher powder charges and shorter barrel life.

Isn't 90 grains of H1000 pushing a 215 grain bullet down a. 308 hole at 3195 fps going to be hard on barrels? I haven't seen many people wear out a .308 win barrel, it lasts probably 4000 rounds or better. Isn't a 300 rum gonna be worse?

See how this discussion could keep going round and round......barrel life of kind of one of those things, if you have to ask, you probably shouldn't do it. Also, far too much weight is generally put on it. Most people I know that shoot much have more than one gun, one that is a high volume shooter, better on barrels and uses less components, and a hunting rifle, geared more around all out performance. For the performance guns, a good load is developed, and after that, the rifle is only shot periodically to confirm. Most other shooting is on the high volume gun. If one spends 150 rounds developing a good load, then shoots 50 rounds of practice a year, and 2-5 rounds taking game a year, even 600 rounds out of a barrel will easily last 8 years before a rebarrel is needed.
 

Northkill

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Here's a photo that shows a general preview of the build. I'm doing Bartlein instead of Proof and running a different brake, action, and scope, but using GW stock and bottom metal etc. If all goes well, we'll be up and running in 3 to 4 months. Components seem to be on track so far.
 

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Idaho Trecker

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North Idaho
The 27 Sherman Mag would be a lot of fun! I had a 270 Sherman and my 270ss just got a new barrel spun up also. The newly updated version of my 270ss was built with the intent of running a suppressor and being super handy. The new barrel is a bartlien sendero 1:8 cut to 19.5"
So far I'm shooting the 165 matrix with n570 at 2860 fps. I started my fireforming with the 175 sierra gamechanger while shooting pigs and will revisit them again.
I'll be interested to see what you choose.
 

Lee Goodwin

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Oct 5, 2018
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Central Oregon
The Sig is an interesting concept. Just not my preference. I didn't really want to deal with the specialty brass for their high pressures.
Some pics here for your interest.
Super pressure, if you will. The .270 Winchester’s SAAMI spec maximum chamber pressure is 65,000 psi. The SIG Fury’s is 80,000 psi.
Dang.
And" the steel helps keep the case from rupturing", thanks God for that....I feel better about it.
Where I get one ?
 

Lee Goodwin

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Oct 5, 2018
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Central Oregon
The Sig is an interesting concept. Just not my preference. I didn't really want to deal with the specialty brass for their high pressures.
Some pics here for your interest.
 
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