GP100 Spring kit from Wolff

Results are in

I decided to go shooting at lunch. I had 4 different .38 special loads with 3 different primers.

1) Tula standard small pistol primers with 231 and 158 SWC - all 30 fired
2) Tula standard small pistol with 231 and 140 round nose - all 30 fired
3) CCI standard small pistol with HS-6 and 158 SWC - all 24 fired
4) Tula small rifle with AA #5 and 158 SWC - out of 50, four required a second hammer strike.

All shots were double action.

I may put the heavier spring in but probably not for a while. I'm pretty happy with these results because the trigger pull is very nice now and I have 5K small pistol primers in the drawer (all I could find the last time I ordered). As stated earlier, this is a range toy. My serious guns are all autos.

I think this was $15 or so that was well spent.
 
Hi jack ALERT !

I`ve had misfires with Tulas also , firing on the second hit , but I find em on the tite side & think I`m not "feelin" the primer seat to the bottom !

I use a Hornady hand primer for small primers & have 80 yr ole hands :o
 
Despite removing as much friction as possible, when I ran the heaviest Wolff reduced power hammer spring the gun would not make it though a full cylinder. I was running 45 Colt primed with Remington, Winchester, and CCI. None of them made six consecutive single action shots. Double action was understandably worse.
Click to expand...

I own a GP100 and I have wondered if the failure to fire might be related to the transfer bar not striking the frame flush and being torqued slightly by the hammer. By design the transfer has a lot of play. If this play causes it to sit off the frame, even a few thousands, could it bleed off the energy of a hammer strike. The last time I had the transfer bar out of mine I noticed a very light dimple on the face (looks like the firing pin mark). A little Prussian blue and a good stone should take care of squaring up the face in short order. And if the firing pin channel has soot lodged in the spring or around the pin this might cause FTF just like my old 1911.
Your thoughts here?
 
I found the 9# and 10# hammer springs did not ignite my self-defense ammo. The 11# spring works well, but I'll keep a 12# one around. The greatest improvement came from the 8# trigger return spring. However, keep in mind that the trigger reset is slower. I think the benefit of the improved pull outweighs the speed of reset.
 
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