Thread: My 260AI Load Development Begins

Have had a .260 imp for a while now and think I have my forming and loads as good as I can get them.

Have formed Lapua, Rem, Norma and Nosler .260 brass.
Rem and Nosler work best in my rifle.
I run a 7mm button on my sizing die in enough just to expand the last 3-4 mm of the case mouth.
I prime my cases and fill with an amount of AS30N shotgun powder.
I then get a 1 x 1 M16 cleaning patch and cram into the case.
Fire them off. I end up with a formed case with a reasonably sharp shoulder.
I load up my pet load and shoot them.
I get excellent accuracy on the first firing and scary accurate on about the 3rd. Have not had to trim a case yet and only FL size on about the 5th firing.
I have not shot any Nosler brass to the point I have had to bin them but got around 8-9 goes out of Rem brass.

RL17 worked really well in my .260imp but I have sacrificed a little velocity by using 2209 which is more available imo.
140 class bullets are 2900 fps and 130 are 3020fps. I can get them going faster but case life reduces.
24" barrel on an R93.
Having owned one for a while I have to say I really like the caliber.
My barrel is luckily very accurate and has consitant velocities.
But given the choice again of its parent case or going improved I would probably just go standard.
Nothing I have shot with it couldn't have been done with a .260 Rem.





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