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**Unclenick** · October 7, 2006, 02:30 PM

I think the collet bushing was only in the Goldcup, back then. Increasing the recoil spring to 18 lb or even 20 lb would be a good idea. This will increase the breech lockup dwell time a little. An even better way to do it would be to install a square bottom firing pin retainer, like those EGW makes. That increases lockup dwell, and reduces percieved recoil, too.

The reason to increase the lockup dwell is that the weak spot for the standard 1911 is the unsupported bottom side of the casehead. When the gun is driven to recoil quickly, it can begin extraction before barrel pressure is fully down, and this results in a bulge in the side of the case at that unsupported spot. Increasing the lockup dwell minimizes that. You may, however, find the brass is too bulged for reloading anyway.

Nick

October 7, 2006, 02:30 PM	#4
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	I think the collet bushing was only in the Goldcup, back then. Increasing the recoil spring to 18 lb or even 20 lb would be a good idea. This will increase the breech lockup dwell time a little. An even better way to do it would be to install a square bottom firing pin retainer, like those EGW makes. That increases lockup dwell, and reduces percieved recoil, too. The reason to increase the lockup dwell is that the weak spot for the standard 1911 is the unsupported bottom side of the casehead. When the gun is driven to recoil quickly, it can begin extraction before barrel pressure is fully down, and this results in a bulge in the side of the case at that unsupported spot. Increasing the lockup dwell minimizes that. You may, however, find the brass is too bulged for reloading anyway. Nick __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle