I know a guy that buys Talon grips for all of his handguns...they're basically fitted skateboard tape to put on your gun. I like the feel, but like you said, a long range session would leave you with a few less layers of skin.
To get a better grip I use anti-slip tape made for stairways on the front strap of most of my pistols. I buy it by the roll in 2" width at Lowe's or Home Depot. It's basically self-adhesive coarse sandpaper, about 60 grit I'd say. It works great but I wouldn't want to use it for a long session at the range. The textured plastic surface tape would be much better for that. http://www.surefootcorp.com/index.php/skid-guard/ https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Safety-Walk-Slip-Resistant-Medium-Resilient-Tapes-and-Treads-310/?N=5002385+8709314+3293717112&rt=rud
That's what I've been doing for 20 years on my Commander...... I bought the large sheet for a stair tread and still have 75% of the first one. It takes a lot of use to wear through the grit, even with daily handling.That is what is on the front-strap in the pic below. It looks fairly un-worn, so it was probably a new piece I'd just put on when the pic was taken.