280ai powder

[Brambles]

Custom Remington ti 280ai with 9 twist barrel refuses to shoot Retumbo under 1 MOA.



I've tried 162 eld-x and 168 Berger hvld and tried working the crap outta Retumbo with charge weights and seating depths, primers but nothing consistantly under 1moa....kinda frustrating because the 140tsx and RL22 load I worked up years ago was dead simple.

Lots of groups two touching one 1-1.25" away, but I know the bedding is good as it shoots awesome with 140 tsx

I have a good quantity of Retumbo and that's why I wanted to make it work..but it looks like a lost cause....

Reloader brand supply is drying up and talk of temp sensitivity has me wanting to use a different powder. In fact reloading component supply is really hit or miss in Canada these days.

Appropriate powders I have in sufficient quantities are H4831sc, imr 4350, imr 7828, h1000( like to keep that for my 338 edge though)

Got a couple boxes of 160 accubonds im gonna try next....

Any recommendations on powder to try next...?

 

[PGJPJ]

I've had trouble with the 168 grain Berger VLD and RL26. But the 168 Barns LRX and RL26 is showing lots of promise in my 280ai (1:8 twist needed though).

A sure bet will be those 160 grain AB's, and H4831sc. I'd try that, at least to get your confidence back (which can also be important). But that will be a very accurate combination, and shouldn't be too difficult to find a load that works out great.

7828 would likely give you some more speed.

 

[Brambles]

you running standard or magnum primers?

 

[PGJPJ]

I run magnum primers, Fed 215

 

[Brambles]

My 280ai 140tsx load prefers those primers too.

 

[ramrod79]

I wold have to go back in my book for powder charges but My Kimber loved H 4831sc with 168VLD ,and then I went to Berger classic hunter it would put 3 under half inch at 100 yards .
My Cooper hated retumbo as well but shot 140 AB and 160 AB IMR 4831 also liked 168 VLD all three shot MOA out to 1000yards . all loads with 215M Nosler brass. My Cooper 140 / 160 AB loads were max loads in manual .