Python .357 hi velocity Lee 358-158 SWC gas check - 1/3 barrel leading

[gwpercle]

The carnauba Blue lube you have just isn't up to the task. When you get the 450 Lubrasizer ditch the carnauba lube you've been using. Get some NRA 50/50 or 2500+ from LsStuff.com [advertised at bottom of forum]. Given the 'gentle push" through the cylinders the .358 sizing is fine with the Colts bore/groove dimensions.

Also, you shouldn't need to harden COWW alloy as when AC'd for 10+ days it will be hard enough, especially with a GC'd bullet. Instead of hardening the bullets you might ass 2% tin which will give a much better alloy and AC'd bullets with BHNs in the 12 - 15 range.

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Everything Larry says ... Do It !

All of his advice here is ... Spot On !
Gary