mainspring balancing act!

[G.T.]

Hi to all! Over the last 30 years or so, I have been walking a tight rope between balancing a mainspring with the ammo that is available, and of course, all the while, not cause any harm to the user or the pistol.
It is a tendencey of mine to to test with ammo that is relitively mild, such as the Winchester White Box Target / Range ammo. I've had good luck with the ammo as long as I had revised Mec-Gar magazines and good quality replacment springs. At first I had a considerable number of oeiginal armorers springs, mostly Mauser, but that pool has dried up long ago. So, any aftermarket spring could be just about any weight, or condition, or compression?
Just that variable alone makes it difficult to set perimeters that insure success!
Lately, I have been having good results with Wolff standard 38# mainsprings, althought it is too early to see if they stay in spec and keep their strength thru the recoil cycle?
Yesterday, I took two Lugers to the range, using WW White box, it had several short recoil james with each Luger. I was all set to leave, when I thought about some extra ammo I had just acquired that was labeled Winchester TARGET and came in a military style brown box. Both Lugers ran perfectly fine with it, and I ran thru a full mag thru both lugers without a hiccup! When I got home, I see where the ammo was listed at 1300 fps which is 100+ fps over te white box offering?
So, now I'm waiting on the Wolff springs, and will report the results after the next range visit. But, I'm starting to think maybe the new ammo might insure better function, without significent abuse on the Luger. The though being, if it was close to full recoil, the little bit extra will still be in balance and without beating the luger to death... More soon, best to all, til...lat'r...GT...