Head size difference

Reloading equipment, methods, load data, powder and projectile information.

Head size difference

Post by andym79 » 30 Apr 2019, 6:42 am

Hi guys I am wanting to do a 35-90.

The idea going through my head at the moment is to use 45-90 brass and a 350 rem mag reamer run in .375" short. Using dies cut short too.

My only concern is case head diameter, being .513 for a 350 and .506 for a 45-90!

Is a .007" difference too much or okay?

I am hoping to end up with a rimmed 35-90 using cast bullets and either bp or trailboss so pressure will be low, but will I likely get a bulge at the head or worse a split?
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Re: Head size difference

Post by marksman » 30 Apr 2019, 10:02 am

be better to talk to a good smith that does this type of thing

but there can be that amount of difference in a chamber till you fireform, there are heaps of factory sammi chambers out the that will be like it
you wont make really concentric ammo because of the bulge above the case head usually being to one side because the case lays down in the chamber and blows out in the gap

best to talk to a smith :thumbsup:
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