303 pp mold recommendations

[Thundermaker]

I'm just looking for some good molds to use for pp in the .303 Brit. The rifle is a modern one with a .312 groove dia.

[Nobade]

A good first step is to make a chamber cast. That will best lead you in the direction of what your bullet should look like. Is this one of those Ruger #1s from a few years ago? If so you don't have the camming power of a bolt action so that will also dictate the bullet design.

[longbow]

If you want to buy an off the shelf mould these are likely good choices:

https://noebulletmolds.com/site/shop/308-311/303-178-sp-g1/303-178-sp-g1-2-cavity-1gc-1pb-303618/
https://noebulletmolds.com/site/product-category/308-311/303-218-sp-g2/

I made a clone of the NRA design for my .308 Winchester rifle and it cast at 0.301". Worked well in my .308 but when I got my .303's I had poor success with the 0.301" boolit even when patched to match my 0.314" groove diameter. So I knurled some boolits up to 0.303" then paper patched and accuracy was much improved.

Longbow

[Thundermaker]

A good first step is to make a chamber cast. That will best lead you in the direction of what your bullet should look like. Is this one of those Ruger #1s from a few years ago? If so you don't have the camming power of a bolt action so that will also dictate the bullet design.

Didn't know thery ever made No.1s in 303. This is a High Wall.