I have a 5.5" Freedom Arms M97 .44 special. My gun's cyl throats run somewhere between .429 and .430 (.429 plug gauge go, .430 no go). and the grove diameter runs close to .431.
This gun is very accurate with the one jacketed bullet (180gr Horn XTP) I've tried (more accurate than I can hold without a scope).
I've had some leading problems with all plain base bullets. Have tried the following:
1. 240gr RNFP, sized .429”, wheel weights, lubed with Lee Liquid Allox
2. 250gr 429421, .429”, Lyman #2, from Western Bullet.
3. 250gr Keith, .430”, BHN 11 from Mt Baldy.
4. 240gr SWC, .431”, Hard from Laser-Cast
5. 250gr Keith, .431”, Hard from Leadheads
6. 255gr SWC GC (lyman 429244) .430", 22BHN from Montana Bullet Works
The only bullet that I've been able to shoot a lot with very little leading is #.5 --
255gr SWC GC (lyman 429244) .430", 22BHN, LBT Blue lube, from Montana Bullet Works. The only problem with this bullet is that it is about twice the cost of some of the others.
I've gotten decent results with all of the bullets listed above (right at 2" at 25yds) but they will lead quickly in my gun (less than 50 rounds).
With the exception of #1. above (5.5gr HP38) my loads generally are in the 1100 to 1200 fps range using A2400.
Here are the cast bullet mfgs that I have used in various calibers and configurations with varying degrees of satisfaction (mostly due to individual gun preferences):
Montana Bullet Works
http://www.montanabulletworks.com/Mt Baldy
http://www.mtbaldybullets.com/Leadheads
http://www.proshootpro.com/Western Bullet
http://www.westernbullet.com/Oregon Trail
http://www.laser-cast.com/Mastercast
http://www.mastercastbullets.com/home.htmlThis M97 .44 sp is one of my favorites.
Paul