Hi members just wanted to jump in for my first visit and say hello. As mentioned in my subject matter I'm new to the 10mm caliber but but not to firearms. My wife and I moved South from snowy Erie PA to the upstate of South Carolina. In Erie I was 100% focused on self and home defense so I collected a number of 9mm's and a few 45acp. Now that we live in the upstate S.C and only a few miles from the mountains of western North Carolina I've added woods carry to my list of self defense situations. Let me add I have my South Carolina CWP. Anyway I just purchased my first 10mm, a Glock 20SF and have a number of questions. I'm sure my questions have been asked numerous times. For example, will hot factory loads from Underwood, Buffalo Bore or Double tap cause FTF issues? Will heavy Hardcast 220 or 230 grain tumble? Sorry I guess those two were on the top of my list because I will be using my 10mm for woods carry when hiking or camping.
Thank you

Welcome aboard! I have a G20 SF and a Gen 4 G20. I run a 22 pound spring in the SF from Glockstore for the heavy loads. It is the RSA with the stainless steel guide rod (not the tungsten).

It works fine with all the hot loads you mentioned. For the light 10mm I run the standard RSA. The Glocks, being lighter in weight, need a strong wrist lock when you fire the heavy stuff.

I have fired both the Doubletap Hardcast loads, 200 and 230, without any tumbling. These loads are gas checked so they don't lead foul very much. I run a few jacketed loads after them just to be on the safe side. Never had an issue.

Congrats on your new Glock 20 10mm! The Glock is an excellent choice.

Thank you 4949shooter. The RSA you mentioned is already on order. I placed my order yesterday, Along with the SS rod plus 22 pounds. Thanks again for reconfruming.

Howdy from Texas.

I have a G20 gen 4, and keep it completely stock. Buffalo Bore 220 hardcast loads do not tumble in mine, nor do Underwood or Doubletap 200 hardcasts. I have shot a few hundred of them combined with no issues in the stock configuration. Only noticeable difference is all of them seem to leave the gun a bit dirtier than jacketed ammo. I don't want to add different recoil springs to a GLOCK type gun, and have heard of more problems created by doing so than benefits.

230 DT has been said to tumble, so I've only tried 220 and less with no tumbling at close or far pistol ranges.

Welcome to the group and congrats on the new 10mm.

USMC343, welcome to the forum!  Congrats with the G-20SF, it is a great pistol and I also have one.  I run mine with a non captive recoil rod and 22 lbs spring from Wolff Gun Springs and also have several weights to include the 24 lbs. 
Why "non-captive" you might ask?  Here is why;

Glock 20Sf Factory spring test
It takes 5lb 3oz to start the slide to move from the locked position
Full retraction at 18lb 0oz at lock open

Glock 20SF spring test Wolff Gun Springs 22lb RSA installed
It takes 6lb 4oz to start the slide to move from the locked position
Full retraction at 22lb 9oz at lock open

22-Slightly over a pound difference 1lb 1oz to start the slide to move from the locked position
24-Slightly over a two pound difference 2lb 3oz to start the slide to move from the locked position
22-Slightly over a 2 pound difference 2lb 9oz at lock open
24-Slightly over a 6 pound difference 6lb 1oz at lock open

I feel that the extra spring pressure at lock up, is what delays the unlock ever so slightly, this dwell time in battery I feel is allowing for the pressures to drop before the slide and barrel unlock and keeps the brass deeper inside the chamber till extraction cycle starts.  I helps with the higher performance loads for me.  I have seen some factory captive springs drop free when the slide is removed, so that spring pressure is not there at lockup.

I run with the factory barrel most all the time but do have a few aftermarket barrels. for 10mm, 40S&W, 9x25Dillon and even 9mm.
That 9mm barrel uses a very light 11 lbs spring for function.

Welcome!  Haven't been here too long myself and find is a good place to hang out. 

Being from the Hershey PA area I know a bit about Erie.  So basically you left the North Pole (otherwise a pretty nice place) for the wonderful sub tropics of SC.  SC is (as friends have demonstrated) is a sportsman's paradise.  Endless fishing, hunting and all sorts of outdoor life. 

My suggestion is to go out and get a variety of ammo types and brands and shoot them.  There are loads that my G20 does not like and there are loads I did not like.  Just like with any gun/ammo combo.  Glock's are pretty forgiving though so it will be mostly just a personal choice.  Underwood and Buffalo Bore tend to make ammo as hot as is safe to shoot.  Nothing wrong with that but I find it a bit too much.  Double Tap and Hornady ammo tend to be set a notch back in absolute power.  That is my comfort zone.  Your G20 is fine either way.  If you go for the heavy stuff I would heed the comments about running a heavier aftermarket spring. 

I suggest you start your ammo evaluations with the Hornady 180gr XTP factory load from Hornady.  Not that you should settle there (not a bad choice) but that it's a good place to start and compare from.