280 Ackley

[Jbotto]

So instead of making a new thread for this topic, I'm going to jump on this one, as I am getting close to the end of a .280AI build and if I get some time, I'd like to get some rounds to fireform. I can't remember where I read it, but I have heard a good way to fireform rounds is to use a recipe of the parent load, that is halfway between starting load and maximum. Can anyone confirm this? I have a few hundred cases of once fired .270Win brass, that I am planning to run through a .280 FL sizer die and then load them as .280. Cheap brass to start with for the barrel break in process and the beginning steps to reload for this new-to-me cartridge. Those with experience with this round, what are your thoughts on this?

[JeffreyDeGraff]

So instead of making a new thread for this topic, I'm going to jump on this one, as I am getting close to the end of a .280AI build and if I get some time, I'd like to get some rounds to fireform. I can't remember where I read it, but I have heard a good way to fireform rounds is to use a recipe of the parent load, that is halfway between starting load and maximum. Can anyone confirm this? I have a few hundred cases of once fired .270Win brass, that I am planning to run through a .280 FL sizer die and then load them as .280. Cheap brass to start with for the barrel break in process and the beginning steps to reload for this new-to-me cartridge. Those with experience with this round, what are your thoughts on this?

I’ve never used once fired brass, always new for fire forming. The best way I have found for fire forming is to seat your bullet into the rifling so that the brass is pushed up against the bolt face. This ensures that all of the case stretching is forward, so as not to weaken the web area. I use a medium load of faster burning powder to send the bullets.


JTD

[Trapper571]

I have a Montana x3 also,I have used 270,3006 brass,through a 280 fl sizer,then fire form with 35 of h4198 works fine except wrong caliber marking.i think 280 Nosler brass to be best. Nosler black loading manual has a lot on 280ai,140 grain acubond i get3150 and 160 acubond I get about 3000 with h4831sc,almost 7 mag without the blast and recoil

[Trapper571]

So instead of making a new thread for this topic, I'm going to jump on this one, as I am getting close to the end of a .280AI build and if I get some time, I'd like to get some rounds to fireform. I can't remember where I read it, but I have heard a good way to fireform rounds is to use a recipe of the parent load, that is halfway between starting load and maximum. Can anyone confirm this? I have a few hundred cases of once fired .270Win brass, that I am planning to run through a .280 FL sizer die and then load them as .280. Cheap brass to start with for the barrel break in process and the beginning steps to reload for this new-to-me cartridge. Those with experience with this round, what are your thoughts on this?

Hey made a mistake on velocity’s.i get 3050 with the 140s and 2800 with the 160$. My barrel is 24 inches,the Mauser action messed me up at first, cant drop round in chamber, has to feed from magazine, the reloading book is Nosler number 7, but there info is online under Nosler reloading data,,only shot one deer with mine at about 100 and it went 20 yards and fell,shot behind shoulder,work those loads up in book,don’t start at max,,hope this helps some