The 1935 High Power is not hard for ordinary mortals to work on. It is more forgiving than a 1911.
Stove pipes? Get a set of replacement springs. Then go shooting. Or, go shooting and change your grip. Don't limpwrist it! Hold the gun firmly and give the recoil forces every ounce of resistance your noodly wrists can provide.
Mag safety? It was a dumb idea in 1935 and still is. The plunger drags across the front of the magazine. If that spot is not highly polished, you'll have extra resistance and inconsistent trigger pressures. I forget how it comes out, but I remember it just sits in the back of the trigger with a little pin.
Bad feeds? Replace your mags with modern MecGar 10-rounders. The wartime Inglis magazines have been forced enough times to crack the welds and become unreliable. In 2007 when I trained up for Afghanistan what is all we had. There were ZERO feed problems. And way too many old sweats forget that pooled training equipment gets used the most heavily and is therefore the least dependable. Operational equipment is kept in good condition on purpose.
And I forgot to add - fire your Browning the wetter the better. Oil it up. Unless you are shooting a desert survival match, oil it and let a film of carbon form on the bearing surfaces.