Home Forums Hunting & Shooting Hunting Rifles Kimber 84L or mountain ascent in 270 or 280AI

Savage99.
I agree with your post.
Can the .280 Remington factory loads be fired safely in the subject .280AI chamber?

Or is the chamber to Nosler's dimensions which may preclude that?

If a .280 Rem. factory round cannot be fired in it then it's not a true AI but just a wildcat!

i actually have a Kimber 84L in 280AI and I have fire formed all my brass by firing standard 280 Remington in it. No problems and some were very accurate. So, yes it is an AI and Nosler's dimensions did nothing to preclude me from shooting these in my rifle.

Lots of info here. Much appreciated guys. The ascent does have a factory brake on it. From what i understand it does come with a threaded protector. I understand the argument of going overboard with the weight reduction steps. I am going to go ahead with the order on the ascent. Its one of those itches that i need to scratch. besides it is a "gift" so i am going to make it the expensive one

I am also trying to track down a 25-06,270 or 280AI montana 84L for now.

Have you felt inside of your fired brass to see if there is any significant thinning at the expansion web?

What range do you shoot at?

I do most of my shooting here: http://bellcity.org/-.php

Well that's my point then Bob. You can't compare those two objectively when the 270 came out commercially in the 1920's.

Hey Savage- not sure if this was meant for me. I am not in CT so i am not sure where your range is at. I am fortunate to have a private place that i shoot at just down the road from my place. Im very fortunate that way. Makes load development very easy when i can roll my own and be at the range in 30 seconds.

Here is an update. I did order a 84L montana in 25-06 and an ascent in 280AI. I havent played with the quarter bores much, could be fun. Then i look forward to the ascent for the obvious reasons. When i get it i will write up a review of what i think. Checkbook is about as thin as week old roadkill so for now i am about tapped out.

Make that two of us. Nosler 280 brass fire forms quite well in my Montana 280AI. Don't know how accurate it is, I've only fired it 19 times. Too many rifles...

My guess is that you'll fall in love with the 25/06 and trip the 280Arkey to buy more .257" bullets and a bunch of 7828ssc... grin

Thats alot of .257 sleeping pills

After swapping stocks of course - that Ascent camo is tres alluring.

Me, I'd be looking at my recoil tolerance, and possibly considering something lighter kicking in that package.
Even an M action in 7mm-08 (or .260 w/ a bbl swap).

+1 on .280 AI headspace comments from Savage69 :
I have put my AI project on hold until this headspace issue is closed.
Encouraged to hear that people aren't having any fireforming issues with factory .280 in the new Remington/Nosler -.014" AI chambers.
Unfortunately I have .280 Imp 40 dies which would create problems in a SAAMI AI (re-)chambered rifle.

Enjoy your Kimbers !

Should be enough to get you at least most of the way through that barrel... grin

I've used nothing but the neck sizer on my 280 Ackley and the only difference between the two die sets is the FL sizer.

When my 280AI arrives I will try some nosler factory ammo but then use the redding bushing die sets. I don't foresee any problems.

.

I have not felt any thinning at all.

I shoot here http://ledyardsportsmanclub.com/

Only have a 400 yard range so I am limited by the range with my 280AI.

RD : What make etc. are the dies you are using ?
Is that with the SAAMI AI chamber ?

I have a 3 die set of Redding dies for the original version, not the SAAMI.

WOW!!! Brad at a loss for words reguarding Kimbers!!!


LOL!!!!

Did someone say the .270 is boring!? Only until you shoot it. It does everything the 7 Rem mag does.
I've had 3 Kimbers, and two of them were really great rifles. The other just would not shoot. It as a 1.5 MOA rife at best. Twice I've had to scratch the super ultra light itch, and both times decided it was too much of a good thing. I've gone back to a merely light rifle, with a 6.8 lb. 270 WSM. Very accurate at medium range, 5-700 yards, and the WSM version really is mo' betta!
No need to hunt around for a .270 Montana, just go to gunbroker.com.

RD: Well it would help things for the cartridge if it got cambered in some commonly available rifles and ammo were better distributed.

Frankly I am surprised more manufacturers don't chamber and offer it because it really is a good cartridge.....like you I visit gun shops frequently and have seen one 280AI for sale (a Dakota M76 costing over $5k) and exactly one box of ammo ( that's how I know what the case looks like in real life!

I really think it is destined to remain a loonies cartridge,unless someone picks up on it and mainstreams the thing.