G.T.,
I would suspect around 45-55 would be ok. A friend from Europe gave me a real mckoy Luger firing pin gage, but as usual, never used it; always just measured for the above numbers.
I would expect the white box to be a bit milder than most.
Headspace comes to mind of course, but I am sure you check those things. Some of todays brass is on the short side.
The other odd thing might be the firing pin to breechblock hole fit, does the whitebox show primer flow beginnings? I sure see a lot of primer flow and perfs in cases on the ground at the local range.
OTS ammo can be at fault at times, but have to admit, most are pretty good with their QC/QA.
The new sights sound great, heck of a lot easier for most than fabricating your own.
regards as usual.
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