Little help for my first rifle (AR-15) cast project

[just_shooter]

Thank you for the suggestion, armexman. As I said previously, I have many years of hand gun casting experience, but in rifle I'm newbie. Read a lot on this, learned a lot, but some subjects are a little bit controversial. So I have had just 2-3 questions trying to search some help instead of playing Columbus and discover America. Hope I didn't burden you with my ignorance.

Regards,
Simon.

EDIT: Searching engine of this forum is not the best I've seen that's why I may missed something. If so, my bad, won't argue on that.

[just_shooter]

Today I slugged my barel. It's .224. Do I have to stick to this value or better to go at .225 when sizing the cast boolits in search of accuracy and less lead foulings?

[dragon813gt]

Today I slugged my barel. It's .224. Do I have to stick to this value or better to go at .225 when sizing the cast boolits in search of accuracy and less lead foulings?

This line of questioning is why someone told you to read the stickies. This is a very basic question and it has the same answer as casting for handguns, larger than groove diameter. The answers you're seeking for the soda can gas checks on PB bullets don't exists because no molds exist for it. Get a custom mold cut or buy one for conventional gas checks and shoot them. These are the options at this time. At the velocities you shoot the AR at I see no reason not to use conventional gas checks. The cost of aluminium to make your own is very little and gets washed out. You will also have the tool to make them in less than a week compared to a potential long wait for the PB check maker.

[xacex]

Yes, I know what you mean with this pin-sized boolits, I sometimes feel the same way.


Which caliber are you shooting in your AR, .300 BO?

Yup, 300 BO. I may play with the 5.56 again in the future since I have the mold, but for now I am having fun with the blackout and pushing them faster than I could with the 223 while maintaining any accuracy. I am to cheap at the moment, or to poor to buy a 1/12 twist barrel just for shooting cast 223 in an AR. Building a suppressor, and more form ones before spring of next year is taking up all of my expendable funds.

[jayjay1]

@xacex:
If I understand you correctly, you say it is necessary to a 1/12" barrel in an AR to shoot cast boolits!?

@dragon:
I would love to read a sticky about cast boolits in an semi-automatic AR, if I could find one.
Do you know some?