Proper cast bullet fit?

[rockquarry]

As for pressure increases with cast bullets that are oversized by several thousandths... I called Lyman on this and spoke with one of their ballistic guys, maybe the boss. He said pressure increases were not great.

I'm pretty sure, however, that he wasn't speaking of extremes like a .361" 22 BHN bullet in a .355" bore with a maximum load.

I don't know the bore size in any of my revolvers. Two Pythons shoot best with .359" bullets of wheelweight alloy. However, .358"s are so close in accuracy and shoot so well in other guns, I size everything to .358". Too much trouble to keep up with and segregate bullets for different .38s and .357s.

 

[Snapping Twig]

358156 has two crimping grooves, so it can be set deep for use in N frames.

I cast them 160g from WW, air cool and they are @ 12 on the hardness scale.

I size them .358, use White Label BAC and observe no leading.

In 38Spl, I do not use the gas check and they are accurate, again with no leading.

I've even used them in magnum w/o gas checks with no leading.

358429 is sweet too. In an L frame I can crimp them in the crimp groove, but for the N frame I crimp over the driving band.

Hope this helps.

 

[fredj338]

I ended up buying a used RCBS 38-150. I'm going to give that a try and see how it goes.

I was using a mag primer because Hornady listed them in their load manual for 2400.

Jared

The mag primer is not needed but nothing wrong with it. You'll like the 150, very good swc design.

 

[mikld]

"Push through", "tight push through", "drop through", etc. are not measurements. Do yourself a favor and measure the cylinder throats properly. A "ball gauge" or pin gauges will tell you what size the ID is of the cylinder throats and you should size the bullets this same diameter. A larger bullet will be swaged down as it passes through the throat and a smaller bullet will often lead the barrel. This should be done in conjunction with slugging the barrel to make sure the throats are bigger than the groove diameter. Or you could just make a WAG and you may get lucky with a .358" bullet...

 

[cowboy4evr]

Anyone who doubts post #18 or #24 , just buy Veral Smiths book " Jacketed Performance with Cast Bullets " Go to his website " LBT Molds " Veral has forgotten more on shooting cast bullets in revolvers , semi auto and rifles than most every know . He is a cast bullet mold maker of the highest quality . His cast bullet lube is first rate .

 

[Warren Sear]

^^^Yes, that is a great book. I have had my copy for 20 years.