I put one on my beretta 391 this past summer when i was shooting in t-shirts and i did'nt think it made a huge difference, but shot all summer with it. Now here in PA where the weather is getting cold and i have to wear my shooting jacket, i switched back to the factory pads because of the l.o.p.(limbsaver increases the l.o.p.) i feel the limbsaver made a big difference for me. Especially with the gel-pad. I'm shooting the factory soft pad. I will put the limbsaver back on this spring
As far as you doing something wrong i dunno, maybe gun fit? Thats my 2cents 