My titegroup load with 147s is 3.2grains for minor +10%.
With those 158s I'd spitball at 2.6 - 2.8 grains starting.
I have found that these rounds don't feed relaibly with guns without real feed ramps like a common, rampless 1911 and a 9mm TT type pistol (by Norinco). No issues with a Beretta 92 or Taurus equivalent however - even though these, technically, don't have a single, continuous feed ramp.
The browning HP will gobble these rounds up all day with no misfeeds.
Obviously the powder coating makes a total difference in terms of feeding. Bare lead 159 gr SWC boolits with gooey lube all over them probably wouldn't feed in any 9mm semi.
I swear by powder coating. I can't see any reason to shoot bare lead lube bullets today - unless you like getting a stinky blast cloud of blue smoke in your face every time you touch off a round or you like the hassle and expense of hard-to-find, fiddly gas checks.
It is a lot easier to get a 9mm major load by increasing bullet weight than by increasing velocity. That is because bullet (kinetic) energy
in the real World (i.e. according to the laws of physics) increases by the
square of velocity (bullets weight times velocity
squared - times a constant) - but the people who came- up with the Power Factor Calculator ignore (or didn't understand) physics - and have bullet power defined by bullet weight times velocity. Therefore, a load which has a kinetic energy value of, lets say, 380 FPE will have a
way higher power factor if that number was based on a heavy bullet going fairly slowly versus a light bullet going quickly.
If you don't get this, chances are you didn't take grade 9 physics - or didn't do to well in it if you did ("what was that weird, confusing stuff they talked about called 'Newton's second law', back then")
Anyway, it turns out that others have played around with loading and reloading 9x19 with 158+ grain projectiles. There are European factory 158 gr jacketed loads sold in the States - for people who quietly like powerful subsonics. Also, the good folks at
cast boolits have a chat about 158 grain LRN 9MM Loads (CLICK ON LINK). However, they kinda overlooked the PC part of the formula. That is the piece that makes it all work IMO
