The Vintage Nontoxic Ammo Quest: 20 Gauge

[Milton C Starr]

Probably the best thing to do if you come up with a load that in theory should be safe is just spend the $40 or whatever it is and have Precision Reloading test them. Like if you used that bismuth data thats in the 10k psi range ideally if they were rolled crimped and used a fiber wad the pressures theoretically should drop by a noticeable degree but having them tested would give you some concrete data. As well roll crimping depth can raise or lower pressures but no one ever lists what depth they roll crimp to.

[MIKE FISHER]

Originally Posted by Milton C Starr

Probably the best thing to do if you come up with a load that in theory should be safe is just spend the $40 or whatever it is and have Precision Reloading test them. Like if you used that bismuth data thats in the 10k psi range ideally if they were rolled crimped and used a fiber wad the pressures theoretically should drop by a noticeable degree but having them tested would give you some concrete data. As well roll crimping depth can raise or lower pressures but no one ever lists what depth they roll crimp to.

OK, helps to have a little idea of the price range and process. Never thot about the depth of the roll crimp making a difference; of course, I have not considered roll crimping before. Thx again.

[MarketHunter]

The only reliable source of smallbore non-toxic shells I'm aware of currently is Boss, but they're waterfowl loads so not the kind of powderpuff shells you boys seem to prefer.

[J.B. Books]

A significant issue at the present time that makes reloading 20ga bismuth difficult is the fact Remington SP20 wads are not currently available. If you go on the Hodgdon On-Line Reloading Data Center you will see that almost every 7/8 ounce or 1 ounce loadings of bismuth calls for that wad. There is no telling if we will ever see that wad in production again with the Remington bankruptcy and Vista buyout.

Personally I would not have a problem taking a 7/8 ounce lead recipe and substitute the same volume of bismuth shot. It should be close to 3/4 ounce and from what I have read substituting bismuth in the same volume NOT weight will yield a similar pressure. If you are concerned about that approach you can have the load tested.