A 295 will be fine. It might come close if it is a BFG/Mickey Thompson type tire, but you will be fine. Most 315's require the lower profile bolt...and some 305's as well....but everything depends on the actual brand and how they measure the size of the tire.
If it is going to rub, it will only be when all the weight is off the rear wheel anyhow...so just don't be taking any jumps and you will be fine.
Worst case, order them and put them in...they are only about $15 I believe, so might as well get it out of the way and run 315's later.
"When I know more, I'll be forthcoming. Or I won't be forthcoming, and I'll be honestly deceptive." - Les Miles