20-250

The 20-250 is a whole lot of overbore with a pretty short barrel life just to shoot some kind of specialty light bullet out of. Doesn't really seem like the juice would be worth the squeeze. I had a fast twist one built a few years ago but mine was intended to specifically shoot the Berger 55's so even if I wanted to I don't think any of the lighter 20 cal bullets would survive the RPM they'd be spinning much past the end of the muzzle.
 
The fast twist is even more specialized with an even shorter barrel life too though. Significantly shorter barrel life. Almost half of the .20-250's with fast twists I personally know of being built, were throwing poofs in under 500 rounds. A couple never even got a load fully developed - they were throwing poofs right off of the lathe.

That's one combo I never had any interest in!

- DAA
 
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