Buy .45 Auto RIM Ammo for Sale
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Buffalo Bore Ammunition Standard Pressure, Bba 31b/20 45ar 200g Jhp 20/12
Brand:
Buffalo Bore
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.45 Auto RIM
Grains:
200 grain
Rounds:
20
From:
$39.79
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14
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Buffalo Bore Ammunition Standard Pressure, Bba 31a/20 45ar 255g Hrdcst Fn 20/12
Brand:
Buffalo Bore
Bullet Type:
Hard Cast Flat Nose (HCFN)
Caliber:
.45 Auto RIM
Grains:
255 grain
Rounds:
20
From:
$39.79
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13
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Buffalo Bore Ammunition Standard Pressure, Bba 31c/20 45ar 225g Wc 20/12
Brand:
Buffalo Bore
Bullet Type:
Wadcutter (WC)
Caliber:
.45 Auto RIM
Grains:
225 grain
Rounds:
20
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Buffalo Bore Ammunition Pistol, Bba 32b/20 45ar 200gr Jhp +p 20/12
Brand:
Buffalo Bore
Bullet Type:
Jacketed Hollow Point
Caliber:
.45 Auto RIM
Grains:
200 grain
Rounds:
20
Frequently Asked Questions
Buy .45 Auto RIM Ammo for Sale
Is 45 auto rim the same as 45 ACP?
No, they're different cartridges. .45 Auto Rim has a thicker rim designed for revolvers without moon clips. .45 ACP has a smaller rim and requires moon clips in revolvers. Both use the same bullet diameter and similar powder charges, making Auto Rim the more convenient revolver option.
Can you shoot a 45 auto rim in a 45 Colt?
No. The .45 Auto Rim has a rim thickness of about 0.090 inches versus the .45 Colt's 0.060 inches. This causes headspace and functioning problems in a standard .45 Colt cylinder. Some revolvers were made with dual cylinders to handle both, but never mix them in one cylinder.
What is a 45 auto rim?
.45 Auto Rim is a rimmed cartridge developed by Peters around 1923 for revolvers like the S&W Model 1917. It uses the same bullet and case dimensions as .45 ACP but adds a thick rim, eliminating the need for moon clips when loading revolvers.