I'll probably go with the 200gr XTP Underwood, thx all.

What do you find the cheapest but best range ammo? If I wanted to convert the G20 to .40S&W for range work, what all do you need to buy? Barrel, mags, recoil spring? Or what other calibers have you done conversions to? I have 2 Glock 9mms already for CCW and range work too.

4949, have you shot the Underwood XTPs? They seem like another good compromise round. Would you go 180 gr or 200gr?

Thanks! I emailed Underwood, who assured me no modifications to a Glock 20 are needed for their ammo.  He did say the 200 and 220 HC recoil the most and for some shooters, a 22lb recoil spring helps. But, limp writing is by far the #1 cause for failure to feed issues. I'm a big guy with big hands, have no problem one handing a .44mag Super Blackhawk and really dont consider myself recoil sensitive.

I do want a happy medium full power round. Anyone have experience with the Underwood Extreme Hunter 150gr? Seems like it could be one.

Are there any significant advantages going Gen 4 over Gen 3? I know the differences on paper, but does the gen 4 double recoil spring matter THAT much? I doubt it add backstreps to the handle; my gen 3 Glick 17 and 26 fit me just fine and have for over 10 years.

Greetings. I've been lurking, researching hard about the 10mm and I've decided to buy a Glock, probably next week, probably a Glock 20. I've read about Glock 20s kabooming or having fail to feed issues with HOT heavy loads. I dont reload, will buy factory ammo. I DO NOT wish to upgrade the barrel and recoil spring. I've read here somewhere that so long as you stick to the 1200fps with a 180-200 grain bullet, problems are rare.

Based on my research, for woods carry(in the Southern Appalachians, where I'd need a round suitable for black bear, hog AND people) and possibly for deer hunting, I'm thinking either Federal JSP or Underwood Extreme Hunter. Heres where I ask for your experience, with either these two or something else.  I want the best DO IT ALL round that wont jam or break a stock G20. I understand DO IT ALL means compromise. Thx