Hi All,
Have owned this pistol since it was new in 1968.
This is a recurring topic of which I have read posts with great interest and have applied solutions. Did the extractor service then replacement and Mag lips adjustment. Did not Work still double feeds. Took it to a gunsmith who has been good over the years ,though I'm doing almost all of my own work.
He said it was ejector / slide stop assembly that was not aligning. He heated it and bent and ground it in lieu of replacement. Said one of 4 mags was bad and nothing that could be done for it. Gun was supposedly test fired with 50 rounds of CCI SV ammo during process.
Got back , took to the range fired one round of from same lot of ammo gunsmith had. Got double feed . Spent case ejected and two cartridges fed, the lower cartridge pushing up the rim base of the top one before it could chamber. got same result with all mags. Got charged a hefty price for repair, says he'll make it right ,but if there are other issues I'll bet he'll want to charge extra . I think the wrong part was fixed and/or the pistol was not thoroughly diagnosed.
I found by luck new old stock ejector/ slide stop assembly to replace repaired part if needed. Got it very cheaply and drops right in with no fitting . dimensions are almost exact , had to re-blue it.
Disassembled entire pistol except for trigger and hammer group. also got new trigger link with slide stop.
Found Breech block has battered .002 + imprint in barrel on the sides and top of chamber. went over this area lightly with 1200 paper to remove dirt and highlight indentations. The chamber was cleaned throughly so fired cases will come out easily and new enter same.
The Breech block protrudes .009 beyond the slide face, hence accounting for battering imprint in Barrel.The the sides and top of breech block are slightly rounded and battered rough metal can be felt on the side and top edges. The retaining pin comes out relative easily and does not feel loose. The breech block does not appear loose in slide upon taping and applying lateral pressure(Wiggle). Imprint is full length on extractor side an partial on other side. Alignment? the right rear of the pistol frame has more wear from the slide than any other place , a small section of the hash marks have been worn away.
Breech Block has a face depth of .047 or head space, with sides a top equal. Have not measured head space on a blow back semi auto before , but Assume I am correct. Please validate my process or advise correction. Since there is a battered imprint in barrel of .002 that would make Head space .045 and I believe a good spec figure is.043 however there is usually a G-Ng range?
I don't know if I have the the tools to to check slide/ breech block alignment with chamber. Have never had to do it. What is the method?
Also have tried new factory weight 7.5 pound and a 7 pound recoil spring. The reduced 7pd. did nothing. There is always a 6.5. Have a new main spring. Is there any benefit to clipping one or two coils off the original to reduced tension? Will it make matters worse?
Once the Pistol functions well then mags can be checked and adjusted (lips) . ordered one new mag.
Measurements taken with Brown and Sharp dial calipers constantly calibrated with gage blocks.
I believe there are more than one defect occurring at one time.
Suggestions and opinions?.
Please advise? Osprey902
Have owned this pistol since it was new in 1968.
This is a recurring topic of which I have read posts with great interest and have applied solutions. Did the extractor service then replacement and Mag lips adjustment. Did not Work still double feeds. Took it to a gunsmith who has been good over the years ,though I'm doing almost all of my own work.
He said it was ejector / slide stop assembly that was not aligning. He heated it and bent and ground it in lieu of replacement. Said one of 4 mags was bad and nothing that could be done for it. Gun was supposedly test fired with 50 rounds of CCI SV ammo during process.
Got back , took to the range fired one round of from same lot of ammo gunsmith had. Got double feed . Spent case ejected and two cartridges fed, the lower cartridge pushing up the rim base of the top one before it could chamber. got same result with all mags. Got charged a hefty price for repair, says he'll make it right ,but if there are other issues I'll bet he'll want to charge extra . I think the wrong part was fixed and/or the pistol was not thoroughly diagnosed.
I found by luck new old stock ejector/ slide stop assembly to replace repaired part if needed. Got it very cheaply and drops right in with no fitting . dimensions are almost exact , had to re-blue it.
Disassembled entire pistol except for trigger and hammer group. also got new trigger link with slide stop.
Found Breech block has battered .002 + imprint in barrel on the sides and top of chamber. went over this area lightly with 1200 paper to remove dirt and highlight indentations. The chamber was cleaned throughly so fired cases will come out easily and new enter same.
The Breech block protrudes .009 beyond the slide face, hence accounting for battering imprint in Barrel.The the sides and top of breech block are slightly rounded and battered rough metal can be felt on the side and top edges. The retaining pin comes out relative easily and does not feel loose. The breech block does not appear loose in slide upon taping and applying lateral pressure(Wiggle). Imprint is full length on extractor side an partial on other side. Alignment? the right rear of the pistol frame has more wear from the slide than any other place , a small section of the hash marks have been worn away.
Breech Block has a face depth of .047 or head space, with sides a top equal. Have not measured head space on a blow back semi auto before , but Assume I am correct. Please validate my process or advise correction. Since there is a battered imprint in barrel of .002 that would make Head space .045 and I believe a good spec figure is.043 however there is usually a G-Ng range?
I don't know if I have the the tools to to check slide/ breech block alignment with chamber. Have never had to do it. What is the method?
Also have tried new factory weight 7.5 pound and a 7 pound recoil spring. The reduced 7pd. did nothing. There is always a 6.5. Have a new main spring. Is there any benefit to clipping one or two coils off the original to reduced tension? Will it make matters worse?
Once the Pistol functions well then mags can be checked and adjusted (lips) . ordered one new mag.
Measurements taken with Brown and Sharp dial calipers constantly calibrated with gage blocks.
I believe there are more than one defect occurring at one time.
Suggestions and opinions?.
Please advise? Osprey902
