Hank,

Great news, and things look good. The new firing pin spring is included with all Wolff recoil springs that they sell that are rated above factory. They are "needed" to keep the firing pin from slamming against the primer under the recoil/return of the heavier recoil spring. I never tested to see if it was happening with the stock firing pin spring, I just install them and be done with it. Not a lot of reason not to.

You might find that you do not need the tools to install the Wolff spring now that you have fired it a few times. The spring will take about a half inch of set now, so it should be easier. Your loads mirror mine pretty closely, so hopefully you will find them to be very accuarte. Keep us posted.

As to the bullet setback, it is important to check the first round in the magazine, and at least the last, as these two positions can be different. The same if trying a different brand of magazine, as different brands usually have different followers and lip geometry.

Craig