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Dave- As for 10mm loads being equal to .41 mag I would say somewhat in the 170-200 grain area but only with a 6inch barrel in 10mm and 3.5-4inch barrel in .41mag. The 10mm can't keep up with the .41 mag in heavier loads. 1350fps with a 6in barrel for 250-265 grainers in .41 mag is way more then Buffalo Bore 220 hardcast running about 1300 from a 6inch barrel or Double Taps 230 grain running about 1175fps through the same 6inch. IMO the difference between .40 S&W and 10mm is the same as 10mm and .41mag when loaded to is full potential.

So I guess the only real benefit to the 4th gen is if you want to add bigger back straps or the dual recoil spring? Dual recoil spring, maybe. Adding back straps no way! I had to wait a long time to buy a Glock 20 because the non SF is hard to hold with even a medium hand. I honestly wish you could make it just a little smaller.

Keith- Is the 4th gen Glock 20 out? I haven't seen it for sale yet and when I called Glock about 3 months ago they told me early next year? Glock told me the recoil spring will be different and you can add backstraps to it? But the smallest configuration is just like the SF 3rd gen grip.

A little late but since I own both the .40 S&W and 10mm I thought I would give you my 2 cents. I have dropped a feral hog with a Glock 27 with UMC 180grain ball ammo with a lung shot. It did not stun it! Walked up and put one more in him, dead end of story. Just run 180-200 grain loads in .40 S&W and you should be fine. Double Tap is the only one I know who commercially loads 200 grain rounds for the .40S&W (someone please correct me if I am wrong). It is no longer the xtp bullet but a nosler hp, which will work just fine or they also have 200 grain FMJ flatpoint or Hardcast. Those two will penetrate over 25inches easily.

Most of the time I carry my Glock 20 with 6inch factory barrel and load 180 grain or heavier and that will do the trick. I personally carry Hornady factory 200 grain xtp. I runs about 1125 from my 6inch barrel and is very easy to shoot and get back on target. I have seen ballistic media test showing 21-26inches of penetration and that is more then enough for a boar or feral hogs.

Also, something to consider is the eurasian boar. I have only seen one and it was shot with a .30 .30 win., not a pistol. There are very few of these compared to feral hogs. They have a much thicker hide and shield then your standard feral pigs or feral pig/ boar hybrid. My buddy who hunts hogs regularly said they have grown in numbers in the past ten years because hunters have specifically reintroduced them into the wild. I would want at least a 10mm in semi auto or .41 mag or better in a revolver for these porkers! They are not as common because they usually breed in with feral hogs but if newly introduced they are pure boar and should not be taken lightly!