Today was the day I finished the conversion on the Sig Platinum from a Series 80 to the Series 70. The Series 80 parts from Sig are thinner than same parts from Colt. TJ shims from are the correct size for a Colt but required reduction for a correct fit in the Platinum. I had to take the part from 50 thousandths to 49 thousandths. That took a while with 600 grit sandpaper, but boy is it smooth. I also polished (LIGHTLY) both sides of the sear. I don't have the necessary equipment to measure the trigger pull, but it seems to be less than the original (or it may be the Proud Papa syndrome). With what I learned from this (3 1/2 hour) job, I did the same thing to my Gold Cup in 18 minutes. Correct sized drop in part helped with that time.
:shades:
Make sure you check the Shim every 1000-2k rounds they like to ding up around the sear and hammer pin holes... Some have reported they cut into the sear and hammer pin but i've never see that
The sig's have a much tighter tolerance than any production 1911 I have ever owned. I put the shims in 2 sigs and they had to be fitted also. I like to stone everything.
I've never had any problems with the shims, and I would guess there would be less likely on the sigs since there is no play at all, but I check all the parts in my guns regularly anyway.
Thanks for the input, I knew the Sigs had tighter tolerances but this proved it. I was planning on detail strips every 2k rounds show I will add this to the parts check.
I thought the Dan wessons were tight, and they are, but the sigs have to be the tightest production guns out there.
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