Yeah. Its hard to describe. I was shooting both loads at exactly 134 PF. The WST felt like a small firecracker going off in your hand, which is something I haven't felt with Solo, n320, titegroup, clays, or e3. It was distracting and my bud had the same reaction to it. Both of us agreed that Solo 'felt' better in the two 2011's we were shooting. It was butt @ss cold out there so we didn't do anything on the timer, though. I'm probably going to lower the charge weight and shoot it around 125-130 PF for practice until its gone.
I'm shooting Bear Creek 147 Molys at 1.18" You and I are definitely not comparing apples to apples. That may explain the difference.
How many grains of Solo are using for your load? I've been using Solo for my .40 and really like it and would like to work up a load for 9 with the same 147 bearcreek molys