Biggest, Finest Specifications

Long Cylinder Specifications
.30/30 Winchester with 10" barrel has a twist rate of 10, groove diameter of 0.308 and weighs 5.3 pounds.
.444 Marlin with 10" barrel has a twist rate of 16, groove diameter of 0.429 and weighs 4.8 pounds.
.45 Long Colt/.410 with 7.5" barrel has a twist rate of 20, groove diameter of 0.451 and weighs 4.5 pounds.
.45/70 Gov't with 7.5" barrel has a twist rate of 14, groove diameter of 0.458 and weighs 4.3 pounds.
.45/70 Gov't with 10" barrel has a twist rate of 14, groove diameter of 0.458 and weighs 4.7 pounds.
.450 Marlin with 10" barrel has a twist rate of 14, groove diameter of 0.458 and weighs 4.7 pounds.
.460 S&W Magnum with 7.5" barrel has a twist rate of 16, groove diameter of 0.451 and weighs 4.3 pounds.
.460 S&W Magnum with 10" barrel has a twist rate of 16, groove diameter of 0.451 and weighs 4.7 pounds.
.500 S&W Magnum with a 7.5" barrel has a twist rate of 15, groove diameter of 0.500 and weighs 4.5 pounds.
.500 S&W Magnum with a 10" barrel have a twist rate of 15, groove diameter of 0.500 and weighs 4.7 pounds.

Short Cylinder Specifications
.22 Hornet with 7.5" barrel has a twist rate of 9, groove diameter of 0.224 and weighs 4.4 pounds.
.22 Hornet with 10" barrel has a twist rate of 9, groove diameter of 0.224 and weighs 4.7 pounds.
.454 Casull with 6.5" barrel has a twist rate of 16, groove diameter of 0.451 and weighs 3.7 pounds.
.454 Casull with 7.5" barrel has a twist rate of 16, groove diameter of 0.451 and weighs 3.8 pounds.
.480 Ruger/.475 Linebaugh 6.5" barrel has a twist rate of 15, groove diameter of 0.475 and weighs 3.6 pounds.
.480 Ruger/.475 Linebaugh 7.5" barrel has a twist rate of 15, groove diameter of 0.475 and weighs 3.7 pounds.
.50AE with 6.5" barrel has a twist rate 15, groove diameter of 0.500 and weighs 3.6 pounds.
.50AE with 7.5" barrel has a twist rate 15, groove diameter of 0.500 and weighs 3.7 pounds.

• Height is 6-inches.
• Width is 1.75-inches.
• The long cylinder overall length on the 7.5" barrel revolvers is 15-inches and on the 10" barrel revolvers is 17.5-inches.
• The short cylinder overall lengt
h on the 6.5" barrel revolvers is 12.75-inches, on the 7.5" is 13.75-inches and on the 10" barrel revolvers is 16.25-inches.
• Trigger pull is 3-4 pounds.
• All weights are approximate since scales may vary.
• Sights: Factory-adjustable rear with fixed black front.
• Number of shots: 5
• Finish: Brushed stainless steel construction.
• Barrels are stress-relieved and cut rifled.
• Current production revolvers are shipped with rubber grips and scope mount* (Weaver style).
• The .410 shot shell / slug cartridge is not compatible with the .45/70 caliber revolvers. The .45LC/.410 caliber has modified choke and wrench included. The .410 will accept 3" shotgun shells.

BFR AMMUNITION QUESTIONS

The only safe and Magnum Research recommended ammunition to fire in our BFR revolvers is the caliber that is marked on the revolver OR it’s extra cylinder if so equipped. It is extremely dangerous to fire the wrong caliber ammunition in any firearm. Less than satisfactory accuracy and performance will often result as well. Simply because a cartridge may “fit” into a chamber does not mean it is safe to fire.

THE ONLY MRI AUTHORIZED AND TESTED EXCEPTIONS TO THIS RULE ARE:

• It is safe to fire .500 JRH ammo in .500 S&W chambers.
• It is safe to fire .480 Ruger in .475 Linebaugh chambers.
• It is safe to fire .45 Long Colt in .454 Casull chambers.
• It is safe to fire .45 Long Colt 2.5-inch and 3-inch .410 ammo as well as .410 slugs in our .45LC/410 revolvers. NOTE: when firing .45LC or .410 slugs the choke tube MUST be removed.
• It is safe to fire .45 Long Colt and .454 Casull in the .460 S&W chambers; keeping in mind that the .45LC and .454 Casull are shorter than the .460 S&W.  Due to the shorter overall length the bullet has to travel a longer distance before entering the barrel.  The result is typically a loss in accuracy.

No other ammunition may be used in our BFR revolvers that are not marked on the revolver.

*All BFR's are shipped with MRI scope mount (Weaver style) included in packaging (except for .45LC/410) and are drilled and tapped for installation with screws supplied. New MRI scope mount may be purchased separately for previously owned BFR's sold by MRI before 12/31/03 (see scope mount section). Please note that your BFR revolver will need to be tapped and drilled in order for the scope mount to be attached - we can do this here at Magnum Research (you will need to ship us your revolver at your expense) or you may want to save on shipping costs and have a local competent gunsmith do this for you.