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545 Posts
Over the years I have run across some things that are new to me, but I'm sure are not new to many of the talented builders here.
Here is the scenario:
I buy a Bar-Sto 9mm ramped commander barrel with #1 locking lug cut to .050". I fit the hood to the slide and go through the motions cutting the lower lugs with Chambers cutters using .186", .193" and finishing with .195" so that the safety goes into the notch with a sliver of space in front. I'm using a .200" slide stop. I start with a #3 to find to my surprise that it's not gonna work. Not even a #5 will allow the SS pin to fit the cut. I decided to place a .005" shim in the #1 lug slot in the slide and recut. Still the SS will not fit. I place another .005" shim for a total of .010" of extra material to cut off and finally a #3 link works like it should. Of course there is also .010" of space between the upper lugs and slide so it's a no go. I set the Bar-Sto barrel aside and bought a Nowlin barrel which has a #1 locking lug cut to .040", the exact amount I needed to fit the barrel perfectly. When you get a Nowlin barrel there are specific instructions to not mess or file any of the locking lugs. After fitting the hood, I went through the motions once again and yes the #3 link fits and functions flawlessly. Like I have mentioned in other threads, I am getting quarter sized groups with this pistol. The slide had a .702 diameter, but I'm sure that doesn't matter. So my question is why in the world would bar-sto cut their lugs to .050" when that lands your firing pin low and also doesn't give you enough material to cut off the feet when cutting the lower lugs? What's up with this picture? How are people using bar-sto barrels with .050" of lockup getting away with using #3 links? Please explain any help would be greatly appreciated.
Here is the scenario:
I buy a Bar-Sto 9mm ramped commander barrel with #1 locking lug cut to .050". I fit the hood to the slide and go through the motions cutting the lower lugs with Chambers cutters using .186", .193" and finishing with .195" so that the safety goes into the notch with a sliver of space in front. I'm using a .200" slide stop. I start with a #3 to find to my surprise that it's not gonna work. Not even a #5 will allow the SS pin to fit the cut. I decided to place a .005" shim in the #1 lug slot in the slide and recut. Still the SS will not fit. I place another .005" shim for a total of .010" of extra material to cut off and finally a #3 link works like it should. Of course there is also .010" of space between the upper lugs and slide so it's a no go. I set the Bar-Sto barrel aside and bought a Nowlin barrel which has a #1 locking lug cut to .040", the exact amount I needed to fit the barrel perfectly. When you get a Nowlin barrel there are specific instructions to not mess or file any of the locking lugs. After fitting the hood, I went through the motions once again and yes the #3 link fits and functions flawlessly. Like I have mentioned in other threads, I am getting quarter sized groups with this pistol. The slide had a .702 diameter, but I'm sure that doesn't matter. So my question is why in the world would bar-sto cut their lugs to .050" when that lands your firing pin low and also doesn't give you enough material to cut off the feet when cutting the lower lugs? What's up with this picture? How are people using bar-sto barrels with .050" of lockup getting away with using #3 links? Please explain any help would be greatly appreciated.