Firearm & Gun Forum - FireArmsTalk.com > Handguns > Revolver Handguns > Webley Mk VI - .455 Webley or .45 ACP?

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Old 02-12-2012, 04:20 PM   #11
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The .45 ACP uses slightly higher pressure than .455 was designed for.
The 45 ACP uses almost half again as much pressure as the loads the 455 was designed for. I wouldn't call that "slightly higher". Plus the chambers and throat on the Webley weren't designed for jacketed bullets, which would raise the pressures still higher.

Read the link.


Quote:
1. The operating pressure for the Mark VI Webley revolver (the last, and strongest, of the .455 Webley service revolvers) was a maximum of 13200PSI (i.e. six 'long tons' of 2200 lbs).

2. The standard operating pressure generated by milspec and full factory loads of .45 ACP ball ammunition is 19,000PSI.

3. The pressure of .45 ACP milspec and standard factory loads exceeds the proof load for the Mark VI Webley revolver.

http://britishmilitariaforums.yuku.com/topic/9296/CAUTION--455-REVOLVERS-ALTERED--SHOOT-45-ACP--45-Auto-Rim
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Old 02-12-2012, 04:24 PM   #12
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Quote:
The .45 ACP uses slightly higher pressure than .455 was designed for.
The 45 ACP uses almost half again as much pressure as the loads the 455 was designed for. I wouldn't call that "slightly higher". Plus the chambers and throat on the Webley weren't designed for jacketed bullets, which would raise the pressures still higher.

Read the link for more info.

I agree that they are too nice to risk blowing up. If you have an original, uncut Webley, shoot it with Fiocchi factory ammo. If you have one that's been cut, shoot it with low pressure handloads with lead bullets.


Quote:
1. The operating pressure for the Mark VI Webley revolver (the last, and strongest, of the .455 Webley service revolvers) was a maximum of 13200PSI (i.e. six 'long tons' of 2200 lbs).

2. The standard operating pressure generated by milspec and full factory loads of .45 ACP ball ammunition is 19,000PSI.

3. The pressure of .45 ACP milspec and standard factory loads exceeds the proof load for the Mark VI Webley revolver.

http://britishmilitariaforums.yuku.com/topic/9296/CAUTION--455-REVOLVERS-ALTERED--SHOOT-45-ACP--45-Auto-Rim
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