.358 RCBS casts at.358

So should I use a .358 sizing die? I'm using COWW and all are exactly .358 ( +.0002 because they are not perfectly round). Was hoping they would cast larger so I could use a .359 or .360 Should add that it is a 200gr fn design with GC. Just try them and see?

The problem we have in our country today is there are more who vote for a living than work for a living !

A wise man's heart is at his right hand, but a fool's heart at his left. Eccl. 10:2

the throat of the barrel would fix that .0002 difference. shoot them as sized and see how they roll. Then determine if you need the extra step of sizing them. How do you plan to gas-check them without sizing?

I Cast my Boolits, Therefore I am Happy.

if you put something besides lead in the alloy it will make slightly larger boolits.
I shoot 358 in my 358 rifle.
it however has a slightly smaller than that barrel and very close to that throat dimensions.

looks to me like you have 2 choices.
put some checks on them and try them.
or measure your gun and know.

it's all an educated guess,,,, till the trigger is pulled.

the more i find out about shootin boolits, the more it contradicts everything i ever learned about shooting jaxketed.

If you have a conventional sizer, try running them through. The lube might not squirt all
over the place. Put the gas checks on and see what happends. Often a "same size" boolit will seal enough for it to work out. Mike

I saw Elvis at 1000 feet. John Force

For a handgun, I'd say .358" is prolly good enuf. If you install a gascheck with a .358" die, no sizing should occur. You should know the dimensions of your gun just to be sure, and aid troubleshooting when problems occur, so slug the bbl. and cylinder throats...

There is a school of thought that no cast bullet is perfectly round and that bullets should be "trued up" by sizing. Nothing wrong with that. For others its the fastest way to lube. A couple of other ideas; sizing damages the bullet so the less of it the better and lastly shooting them as cast is the best way. As with many other things it is probably best to experiment and see which path is the best to follow. Your gun and the size of the group will tell you. A secondary thought is that the barrel of the gun sizes the bullet anyway. Its kind of a "can of worms" to contemplate so probably the best way is to try the variables and see which way works the best. LLS

Was hoping they would cast larger so I could use a .359 or .360

Try adding 2% tin to the COWWs.

Larry Gibson

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Abbreviations used in Reloading
Pointed Soft Point "Core Lokt"

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