I say go for it... can't hurt unless you shoot someone with it and in that case it won't hurt for very long. Might not help much with the accuracy of your specific gun, but I can see how it would help your grip, aim, trigger squeeze, and general function control of the weapon. My own personal note: practice on cats to help increase accuracy on moving targets.
A hit with a .45 ACP beats a hit with a .22 LR everytime. A hit with a .22 LR beats a miss with a .50 BMG everytime.