How can I tell if I need a new mainspring?

unspellable · 03-18-2005, 08:17 AM

It is normal to get slight peening on the ramps. If the peening is excessive it's more an indication of an overly hot load. The strength of the recoil spring will have little to do with it.

The amount of peening will be determined by the slide velocity. The slide velocity will be determined by the impulse of the load. The recoil spring strength has very little effect on the slide velocity. It's job is to bring the togglees to a near stop by the time they reach the end of travel.

The explanation here is that when the pistol is fired, the cartridge impulse will exert a rearward force in excess of 500 lbf. Whether it's a 26, 28, 30, or 32 lbf spring will make little difference to the velocity imparted by a force in excess of 500 lbf.

03-18-2005, 08:17 AM	#1
unspellable User Join Date: Jun 2002 Location: Iowa Posts: 768 Thanks: 0 Thanked 19 Times in 11 Posts	It is normal to get slight peening on the ramps. If the peening is excessive it's more an indication of an overly hot load. The strength of the recoil spring will have little to do with it. The amount of peening will be determined by the slide velocity. The slide velocity will be determined by the impulse of the load. The recoil spring strength has very little effect on the slide velocity. It's job is to bring the togglees to a near stop by the time they reach the end of travel. The explanation here is that when the pistol is fired, the cartridge impulse will exert a rearward force in excess of 500 lbf. Whether it's a 26, 28, 30, or 32 lbf spring will make little difference to the velocity imparted by a force in excess of 500 lbf.