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A new one to play with

I like building and trying out different rifles, calibers, etc and have a new one to try out…what it is just goes to show you how hard I had to scratch to come up with this thing but here goes.

Never cared for the .270 caliber, bullet selection was historically poor and development of anything truly good in the bullet dept was always lacking and I regularly just skipped right on by. An exception could be made for the 6.8 SPC AR’s, but I had jumped on the 6.5 Grendel bandwagon and saw no need to go there.

So when a friend ended up with several hundred .270 cal Federal Terminal Ascent bullets due to mismarked boxes (marked 7mm 155gr), Federal promptly send him the correct bullets and told him to keep the 270’s. Now THOSE bullets I like, great performance on game, well constructed, and generally shoot better than acceptable…so what was I going to build for these bullets? Started looking for a decently priced barrel blank first off. Ended up finding a new never used Beretta Mato bbl in 270 for $99. Threaded for the Mato action, but standard 1.0625x16 TPI. Then found those Weatherby 307 actions for cheap(er) through PTG and got 10 or 15% off when I added an in stock reamer in….270-08 AI….

While those were being delivered I rummaged around and came up with a Bainey’s box mag/follower, an extended bottom bdl assembly, and a lightweight (relative) HS stock I never did use sitting in the parts.

Barrel arrived and I was pleased with that, looks like it is the Lothar Walther barrel these were purported to be used on those rifles. Throat was off center, so I shortened the tenon to where the new chamber shoulder would end at the original 270 Win throat and dialed in the new throat area. Pre-bored the chamber to straighten things out and reamed 270-08 AI.

Tell you what, this isn’t my least favorite caliber anymore…mild recoil, very respectable velocity, and this darned thing put rounds 3-5 in one little knot that is less than 1/2” outside to outside…can’t complain about that! It’s the one in the middle.

IMG_7315.jpeg
 
I've been a 6.8 shooter for a decade, always had a soft spot for .277 bore, but like you said bullet selection has been lacking for decades. Then Berger came out with the 170 EOL. I've often wondered about the 270-08AI as the easy button for a chamber, then I got to thinking and a 1:9 twist barrel with a 284 case necked down, Shehane shoulder diameter and blow it out to 40° would be awesome. Started working on a reamer design in GRT, too.

I'm looking forward to your data and range reports of the 270-08AI!
 
I like building and trying out different rifles, calibers, etc and have a new one to try out…what it is just goes to show you how hard I had to scratch to come up with this thing but here goes.

Never cared for the .270 caliber, bullet selection was historically poor and development of anything truly good in the bullet dept was always lacking and I regularly just skipped right on by. An exception could be made for the 6.8 SPC AR’s, but I had jumped on the 6.5 Grendel bandwagon and saw no need to go there.

So when a friend ended up with several hundred .270 cal Federal Terminal Ascent bullets due to mismarked boxes (marked 7mm 155gr), Federal promptly send him the correct bullets and told him to keep the 270’s. Now THOSE bullets I like, great performance on game, well constructed, and generally shoot better than acceptable…so what was I going to build for these bullets? Started looking for a decently priced barrel blank first off. Ended up finding a new never used Beretta Mato bbl in 270 for $99. Threaded for the Mato action, but standard 1.0625x16 TPI. Then found those Weatherby 307 actions for cheap(er) through PTG and got 10 or 15% off when I added an in stock reamer in….270-08 AI….

While those were being delivered I rummaged around and came up with a Bainey’s box mag/follower, an extended bottom bdl assembly, and a lightweight (relative) HS stock I never did use sitting in the parts.

Barrel arrived and I was pleased with that, looks like it is the Lothar Walther barrel these were purported to be used on those rifles. Throat was off center, so I shortened the tenon to where the new chamber shoulder would end at the original 270 Win throat and dialed in the new throat area. Pre-bored the chamber to straighten things out and reamed 270-08 AI.

Tell you what, this isn’t my least favorite caliber anymore…mild recoil, very respectable velocity, and this darned thing put rounds 3-5 in one little knot that is less than 1/2” outside to outside…can’t complain about that! It’s the one in the middle.

View attachment 1695274
i never thought much of the 270 either till i bought a gunshow 700 adl cheap for the action and decided to try it out before i pulled the barrel. cleaned the h out ofit and took it out with some sierra 90s . 22" factory barrel shot 3600 plus. pretty good accuracy to. that opened my eyes. still have the rifle and bought some more used factory barrels for it. if i need a woodchuck gun around here it will get the nod. it seems i have a unfired rem 7400 in 270 also. it needs shot some
 
So little popularity the forums various titles completely ignore the caliber….didn’t know if I should put this in the ‘BIG STUFF’ that starts at 7mm, or the 6’s, 25’s, and 6.5’s! Never noticed there isn’t a place to even discuss the .270 cal here.:).
 
So little popularity the forums various titles completely ignore the caliber….didn’t know if I should put this in the ‘BIG STUFF’ that starts at 7mm, or the 6’s, 25’s, and 6.5’s! Never noticed there isn’t a place to even discuss the .270 cal here.:).
Ha ha
You are absolutely correct!
 
I'd be interested to see a 175gr Berger Hybrid. Would probably be close to .350 G7. Drop that in a .284 Winchester case, 2850 out of a 24" barrel?
 
Built this as a lighter weight hunting rifle specifically to shoot the 136gr Federal Terminal Ascent bullet as I have a few hundred. 23” barrel, hoping for close to 3000 with that, likely should have 2900+ anyway and that’ll be just fine.
 
The 270 is often overlooked. I've been shooting a 270 win for hunting and target in a ruger #1. After years of shooting, I shot out the barrel. It sat in the safe for a number of years and I wanted to shoot it again. I bought a Lija 3 groove with a 7.5 twist and had it chambered for 270 AI. I used it to shoot an elk at 439 yds with 170 Berger and RL 23. I still wanted a 270 Win so I found a 270 win 15" barrel and put it on my Encore hand gun. I took a deer with it.
Now, I just put a Xcaliber, 27" 7T, 5r in 6.8 Western on one of my F class rifle. I'll try it for the first time tomorrow. I'm using the berger 170 until I can get some of the new Berger hybrid150 target bullets.
I also have a TC contender 14" in 270 JDJ. Took a lot of game with it.
I guess you could say I like the 270 cal.
 
Shot 5 round w/ the 277 Fury bi-metal case and 47gr MR2000. 2900 on the nose w/ a larger ES than I’d like…should just fire form the 7-08 brass I have and go with that I’m thinking.
 

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