yes. most of the sniper weapons have bonus crit. chance. Trail carbine = No bonus crits. Anti-Mat has an ultra-high crit chance so it doesn't matter.
The hunting rifle is 2X normal. The sniper rifles are also 2X, and Ratslayer is 5X. The AMR actually has a low critical chance (1X only), it has a very high base damage, which is why it doesn't matter as much.