New Custom 700 280 AI

Status
Not open for further replies.

Legionnaire

Contributing Member
Joined
Dec 24, 2002
Messages
8,624
Location
Texas
Started life as a stainless Remington 700 Mountain Rifle in .280 Remington.

Bolt received the Ti treatment by Kampfeld Custom, along with a fluted steel firing pin and PTG aluminum bolt shroud. Added a PTG aluminum trigger guard. Tumbleweeds Rifles trued the face of the action and the bolt lugs, set the barrel back a thread and rechambered it in .280 Ackley Improved, installed a Trigger Tech Primary, and bedded the action in the McMillan Edge stock. I just mounted the Leupold VX-3 4.5-14x40 in Talley lightweight mounts. Package weighs 6 lbs 9 oz as she sits.

Work has been killing me lately, so don't know when I'll get to the range to sight it in, but I have some test loads already built and ready to go.

I told my wife I'm done buying rifles. She just laughed.

700mt80ai1.jpg
700mt80ai2.jpg

700mt80ai4.jpg
 
Is there data for the hodgdon us869 in the 280ai. My lgs has a bunch for $21 something. I think it's to slow for my 6.5 prc my work in my 7wsm.
hodgdon lists data with us869 for all bullet weights in the 6.5PRC, but none for either the .280AI or the 7mm WSM.
My experience suggests it would be slow for .280. RL25 and Retumbo returned much lower than expected velocities even when run heavily compressed. RL-22/23 filled the case to 100% and gave good velocity.
4955 and 4451 produced regular .280 velocity at pressure signs (blew a few primers clean out with loads below Hodgdons MAX). Ive got some 7977 Im tempted to try.
 
hodgdon lists data with us869 for all bullet weights in the 6.5PRC, but none for either the .280AI or the 7mm WSM.
My experience suggests it would be slow for .280. RL25 and Retumbo returned much lower than expected velocities even when run heavily compressed. RL-22/23 filled the case to 100% and gave good velocity.
4955 and 4451 produced regular .280 velocity at pressure signs (blew a few primers clean out with loads below Hodgdons MAX). Ive got some 7977 Im tempted to try.
I thought it would be to slow for the 6.5prc with a 24" , but for the price maybe I should try some. They had like 10# for the us869. One day I'll finally work up some warm loads for the 7wsm, I believe it will out preform the 6.5prc some. That short col tho.

There a bunch of new powders I'd like to try but haven't seen the much locally, maybe this year I can get them all out to compare, like to see what the 7x57Ai will do, I can run pretty long in my 09 Argentine.
 
869s slow for almost everything lol. It should work tho, and it should work in the .280AI and 7wsm, but it won't give top velocity even when run to heavy compression.
Much like the 280 and 6.5-284, I think the rl-22/23, 7828, h1000 and 4831 class powders are probably where I want to play, but others obviously will work, and many will work really well.
 
Last edited:
869s slow for almost everything lol. It should work tho, and it should work in the .280AI and 7wsm, but it won't give top velocity even when run to heavy compression.
Much like the 280 and 6.5-284, I think the rl-22/23, 7828, h1000 and 4831 class powders are probably where I want to play, but others obviously will work, and many of I'll work really well.
yes I've been liking h-1000 and h4831 in both, the h-1000 I think maybe better in the cold and a bit more fps, but it's been pricy here if I find it.
 
how long was the turnaround on the custom work?
Tumbleweeds took four months to true, rechamber, and assemble after I delivered the parts.

I also have some H4831sc on hand to try. Found three pounds locally after building the test loads with RL-16. Nosler shows H4831sc as the most accurate powder with 120 and 150 grain BTs on their site; I have a bunch of 120 grain BTs to try, too.
 
Last edited:
Status
Not open for further replies.
Back
Top