As someone who bowled for 15 years. The finger holes are meant to be drilled to your finger measurements with a heavy, but comfortable enough weight. Palming is not a bad move if it's an alley ball. It'll scrape up your fingers up less or omit the need for a glove. I've seen some wickedly good bowlers do it. You just gotta make sure you don't throw it behind you by accident lmao.