I haven't changed the spring as of yet. I have the Diamond D holster on order for my Ruger Alaskan .454, which I also sometimes carry.Nice holster
I use the Diamond D chest holster for about 5 years now…….very convenient way to carry the G20.
Good choice probably the best factory ammo you can carry in the woods in the G20 Underwood 220gr ( actually 214gr by weight)
Did you change your spring poundage and barrel in your G20 ?