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Rifling.

PS - You misspelled your own screen name.

LOL, Mary Kristmus in lights

Descent - Definition and More from the Free Merriam-Webster Dictionary

Decent - Definition and More from the Free Merriam-Webster Dictionary


OP, twist rate is more critical

more rifling means more grooves, which means less bearing surface on the bullet itself, and would be easier to wear. then the grooves would also become tougher to clean and easier to foul up because they are thinner.
 
Let's not over analyse everything. Get out and shoot and have fun. If you're really interested in learning all the details, then buy Bryan Litz's new book, Modern Advancements in Long Range Shooting". ​Everything explained in great detail and makes a very interesting read! You'll know more than all your friends, when you're done.
 
Maybe the OP meant "descent"? Like in a down-sloping shot?

As for rifling, by "more vs less", are you wondering about rifling Twist? Or the number of rifling features in the bore, (lands/grooves)?