Just a very general question, I’m considering trying a paper patched bullet. 

In comparison to a grease grooved bullet, you lose diameter and weight which influences length for stability. Losing length drops more weight.

What prompted the question is when considering a bullet, I realized with 30-32 caliber bullets and the various actual diameters, a 32-35 Maynard groove diameter bullet,.316” should work as a 32-40 paper patch. Same thing .308” groove, .316 bore.

This raised the question concerning twist rate. Random numbers for example. If you’re shooting a 1.5” 250 grain .324” groove diameter bullet in. 1/16 twist, do you end up with 1.3” 225 grain patched bullet?

Related question is how well does a grooved bullet fly patched?

KFW wrote on Nov 14^th, 2025 at 1:27pm:

Poorly worded on my part. 

Grease groove bullet, or any bullet, sized Groove diameter in a 1/16 twist. 
Same bullet is bore diameter and patched in a different barrel, also 1/16 twist.

How well would you expect it to work?
Would length need to be a factor?

It would seem spin is spin, but have been fooled by thinking before.

Dellet, most of my paper patching has been in 45 cal black powder rifles with bore diameter bullets (45-70, -90, -100, -110), but a fair bit in 38-55 and a few experiments in 32-40.

In the 45's I use the same bullet lengths and 1:18 or 1:16 twists that I would use with GG bullets.

Interestingly a long time ago Dick Trenk wrote an article on the stabilizing effects of grease grooves.  If I remember correctly, the grease grooves, being on the rear portion of the bullet, increased the base drag of the projectile which increases the stability.  How significant it is I don't know, but obviously PP bullets don't benefit from that.

Chris.