631 reamed to .327

[keithhagan]

Anyone ream a 631 to .327?

I know the 632-1 were built on the J magnum frame and the 631 were built on the J frame and there is a big difference in pressure between the .32 H&R (21k) and the .327 federal (45k) magnums.

The nominal cylinder length of the 631 (1.44" according to SW Catalog, 4th ed) should be just long enough to accommodate the .327 (1.47" overall less 0.055" rim thickness = 1.415").

The only question mark is whether the J magnum frame in the 632-1 is stronger than the J frame, or whether the cylinder window in the J magnum frame was just made longer when the model 60 expanded beyond .38 to .357. Does anyone actually know, not just heard, that the J magnum frame is truly stronger?

 

[Hondo44]

The J Mag frame was made longer for the 357.

I've found, seen, nor read anything about the strength being increased, besides the cyl is the weak link, not the frame.

In comparison the 357 max pressure is 35K. But of course with much thinner cyl walls.

I can't advise you on lengthening the 32 H&R chambers of the 631 for 327. But your best advice is likely to come from custom 'pistol' smiths who will or will not offer this conversion service.

If any of them are willing to do it, I would feel comfortable going forward. It's about the simplest DIYS conversion one could do.

Some sources to check with:

[email protected] [/email] (converts Ruger Bearcats to 327 Mag)
Magnolia, Texas, north of Houston
Recommendations here: RugerForum.com • View topic - Bearcat calibre conversion ?

Hamilton Bowen - Bowen Classic Arms
(865) 984-3583
SHIPPING/PHYSICAL ADDRESS:
BCA Corporation 3512 Old Lowes Ferry Road
Louisville, TN 37777
MAILING ADDRESS:
Bowen Classic Arms Corp.
P. O. Box 67
Louisville, TN 37777
mailto:[email protected]
+ Bowen Classic Arms + 404

David Clements - Clements Custom Guns
276-238-8761
2766 Mt. Zion Rd.
Woodlawn, VA 24381
[email protected]
Clements Custom Guns

Cylinder and Slide
245 E. 4th Street
Fremont, NE 68025
Phone: (402) 721-4277
Fax: (402) 721-0263
Orders Only: (800) 448-1713
Home - Cylinder & Slide - Handguns parts and accessories

Ben Forkin - Forkin Custom Classics
PO Box 444, 205 10th Ave SW
White Sulphur Springs, MT 59645
406-547-2344
mailto:[email protected]

John Gallagher - Gallagher Firearms Inc.
(205)384-5229
3923 Bird Farm Road
Jasper, Alabama 35503
[email protected]
website closed: www.gallagherfirearms.com

Andy Horvath - DIAGONAL ROAD GUN SHOP
14131 Diagonal Rd.
La Grange, OH 44050
(440) 458-4369, (440) 355-5618

Jack Huntington
JRH Advanced Gunsmithing
775-355-6898
385 Freeport Blvd, Suite 13
Sparks, NV 89431
mailto:[email protected]
New website: http://www.jrhadvancedgunsmithing.com old site: www.jrhgunmaker.com/
His turnaround time is short, his work is first rate, and his prices are reasonable.

Dustin Linebaugh - Dustin Linebaugh Custom Conversions
PO Box 263
Cody WY 82414
mailto:[email protected]
www.dustinlinebaugh.com/index.htm

John Linebaugh - Linebaugh Custom Sixguns
Phone: 307-645-3332
P.O. Box 455
Cody, WY 82414
Delivery (UPS):
177 Louis L'Amour Lane
Powell, WY 82435
www.customsixguns.com/index.htm

Garry Reeder - Garry Reeder Custom Guns
The Pistol Parlor
2601 E. 7th Ave.
Flagstaff, AZ
928-527-4100 / 928-526-3313
mailto:[email protected]
www.reedercustomguns.com/index.html

I hope that's of some help,