Gass relief hole botom of breech block.

mrerick · 11-06-2019, 11:47 AM

I just looked up Sturgess (red edition) on page 1115 where he discusses the modification.

Sturgess describes better performance because of reduced fouling, with the problem being light primer strikes when the firing pin was fouled inside the breech cylinder. The fouling was likely accumulating inside the cylinder in front of the firing pin near where it's face almost contacted the breech block around the pin hole.

Sturgess also acknowledges that an alternate purpose is protection of the breech block in a pierced primer situation.

So... both benefits were considered by Sturgess. A good idea never goes to waste.

11-06-2019, 11:47 AM	#29
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,925 Thanks: 1,377 Thanked 3,140 Times in 1,520 Posts	I just looked up Sturgess (red edition) on page 1115 where he discusses the modification. Sturgess describes better performance because of reduced fouling, with the problem being light primer strikes when the firing pin was fouled inside the breech cylinder. The fouling was likely accumulating inside the cylinder in front of the firing pin near where it's face almost contacted the breech block around the pin hole. Sturgess also acknowledges that an alternate purpose is protection of the breech block in a pierced primer situation. So... both benefits were considered by Sturgess. A good idea never goes to waste. __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.