The trick of headspacing auto cartridges with the forward band of the bullet is not an invention of mine,it was on an article of the ancient NRA cast bullet booklet ,Edited and writted by Colonel Harrison.
It was on a story abot reloading match wad cutters in the 45acp,for bullseye competition.
Having foolishly bulged my 38 superauto barrel,(never shoot another round on an obstruction) I went back to the 9x21.
I got decent results on the steel plates with hard old WheelWeights,and no sizing using the Lee tumble lube 124 grainer.
I have now got a Spartan STI 911 clone ,that sports an US match chamber and a 1/16 twist barrel.Absolutely wonderful,no leading and 20-30 % tighter groups. This STI 911 likes bullets sized .3575,as they come out from a Lee die marked .358.
The problem is the european and Nato tight twist,made for penetrating steel bullets,coupled with cavernous and short throats.
while the American civilian twist is ideal for lead.( 1/16)
At least this is my present opinion, always open to discussion ,and ready to change it.
And let me say again that no auto pistol ,revolver or semiauto carbine is better than the venerable 45ACP.Great accuracy and power,if you do not need a 44 Mag.
It costs more to shoot , bigger bullets and primers,,and you must collect all the brass,I believe that in certain ranges , when I shoot the 45,there are nefarious characters armed with butterfly nets ,stealing good 45ACP,when they are still in the air.
I was able to hit all theese plates.with the browning HP35.
Many people are much speedier ,with Jacketed nines.
Horrible jacketed bullets,what a shame.