Cartridge case quetsion.

[newcastle]

A couple of years ago, i bought 300 pre primed Rmington.303 Brit cases in anticipation of starting reloading. naturally life got in the way and it never happened. so NOW i think i can get to it. I have a bunch of 180grain Sierra .310 flat based bullets to use. However the neck of the case is way too narrow for the bullet. Bear in mind i haven't started reloading yet, so this is an entirely noobish question, but what do i use to expand the neck to fit the bullets?

Information

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[Parashooter]

1. Use your sizing die, which includes an expander to form the inside of the neck to a diameter just slightly smaller than the standard bullet size (nominally .311") - unless it's a Lee collet die, which does the same job by compressing the neck around an internal mandrel.

2. Sierra doesn't list a .310" 180-grain bullet. This is their listing for the nearest item -
.311 dia. 180 gr. SPT Pro-Hunter 2310

3. To learn competent handloading, you'll do well to observe picky little details like that.

[newcastle]

sorry at work going from memory it is the .311. thank you for the information and I appreciate the warning / words of wisdom.

[Comrade Mike]

Run the cases through the sizing die. May need to remove your decapping pin so you don't punch the primers out by mistake