I'm also left-handed. I have owned a 243 Striker for awhile it was accurate, but then I had an oppurtunity to trade it for another XP-100, so I did.
I use a variety of different field rests, depending on whether I am antelope hunting on the plains or elk hunting in the mountains:
backpack, heavy mittens, between my knees, variety of Harris Bi-pods and shooting sticks. While making a stalk I constantly look for a solid rest.
My main hunting XP-100's both have H-S Precision stocks on them that are free floated. They have the aluminum V-Block just like their rifle stocks.
I'm glad to know there is so many on this forum that use a specialty handgun of some kind.
xphunter