Heavier CBs for .223

[wb2754]

Hello,

As a newcomer to the wonderous art of "casting your own", I have run into a what appears to be a common problem with the .223.
I have been using a Lyman 225415 cast from WW with additional antimony and tin to increase BHN and castability. With Hornady GCs and lube they dress out about 55-56gn and are fired from an AR-15 with a 1in9 twist.

I have tried a couple of different loads using Unique and Red Dot with fair success (6-8gn). I've also tried some loads of IMR 4895 (18-21gn) but ran into the vaporising bullet issue. So far, I haven't had any issues with leading.

I understand that a heavier bullet with more bearing surface can withstand higher pressures and twist rates than a slender pointed bullet like the 225415.

I would like to try a heavier bullet, but am hesitant to spend the money for a new mould that may not work out.

Would anyone have any info on this or be willing to sell a few bullets (60-75gn) for testing?

I would appreciate any help.


William

[runfiverun]

vaporizing bullet?
i have run a 55 gr cast boolit in my ar's over 2700 and all hit the paper with accuracy on par with quality jaxketed bullets.

you probably want to look at the 60gr nato boolit molds that noe/miha makes.

[Phoenix]

I shot 70gr cast in my 1/9 AR. at about 2400fps behind H335, 748, BLC(2), WC844, WC846 They run great. Sadly I dont have the mold anymore (I left it on the furnace and it fell off and cracked it in two places) and I dont know the brand as it wasnt marked. I cast it with 1:2 Lead:Lino with gas checks. I am actually looking for a new mold that does the same. They dropped consistently at .2244 which was perfect for my Oly Arms match AR. The thing I liked was i was using very similar loads as jacketed in the same weight.

[375RUGER]

unfortunately NOE and MP are both out of stock on the 60-65g. i was just over there looking a while ago.

[Phoenix]

now you have me looking again. These look just like what I used to cast.
http://noebulletmolds.com/orders/catalog/product_info.php?cPath=24&products_id=88&osCsid=lkt8gp1d0ss2sm9392kfccon97

[7Acres]

http://castboolits.gunloads.com/showthread.php?160062-75-gr-223-5-56-boolit&goto=newpost

The folks on this thread are searching for enough people for a heavy for caliber .224 mold. If you decide to buy you may want to get in on that group buy.