New to me G20

[Left_to_lobster_2020]

First time poster.

I've wanted one these models for as long as I can remember. I traded a buddy for it. I'm the 3rd owner. 
Here's some details:

- Factory frame poorly stippled.
- Wearing a lone Wolf frame
- it came with trijicon suppressor sights. I've changed those out.
- Alpha Wolf threaded barrel and a factory barrel
- TLR-1 is on it
- Talon Rubberized grips

I live in Michigan, not in black bear territory but I do go out west hunting. I think it will be the one size fits all for conceal carry while out hunting. A couple of questions:

I have no idea how old this thing is. It's UWN starter in the serial #. Any idea of the made on date? I can't find it?

I'm a newer reloader and haven't messed with pistols. I want to load some hotter stuff for the woods work. Powder is pretty scarce. I've been able to pickup some 700-X, Red-Dot and Bullseye. I know these are hot powders. I'll stick close to the reloading books I have. Primers wise near impossible to find. Has anyone monkey'd around with magnum pistol primers with the aforementioned powders

I want to load up some 175gr hard cast for my wood work and 180's for plinking. Any suggestions for hard cast producers? Never dealt with it.

Do I need to swap any springs or anything trying to accomplish what I am? I don't have a can so I'm selling the alpha wolf and trijicon for a KKM barrel. I think I'm set there.

Any holster recommendations? I'd like be able to sit in a chair without making uncomfortable.

[Ramjet]

Accuracy over power for loads.

More important the load is accurate.

[Kenk]

Evening  and welcome to the forum. You may want  to look into GunfightersINC chest rigs. I have two of them and really like their products
https://gunfightersinc.com

Ken

[jmm701]

check with Montana bullet works.  They make some great Wide Nose hardcast bullets that are 200 grains.  Another place to get some decent target loads that are coated is ibejiheads.
https://www.montanabulletworks.com/. 
https://www.ibejiheads.com/