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This rifle actually belongs to my son and it has the short action. I gave him a couple boxes of the old Nosler 100 grain BTSP and he immediately ran in to the issue at hand and called me for advice on loading these bullets as they kept falling back into the case after crimping with his RCBS 3rd...

short action.

It is a shirt action.

short action

I also ordered a Lee Factory Crimp Die for this cartridge but, again, is crimping too far up the olgive a good idea?

The rifle used is a Remington Model 700 chambered got .257 Roberts. I tried exceeding the bullet's OAL for my rifle but when I move the bullet out 0.001 beyond stated maximum OAL, it will still fit in the magazine but the cartridge will not chamber in the barrel.

Has anyone loading a .257 Roberts case with the Nosler 100 grain BTSP had problem with the bullet crimping on the olgive (bullet curvature) when set to maximum OAL? When I seat the Nosler 100 grain BTSP bullet to factory maximum OAL, the case rim will have to crimp on the olgive thereby not...