It occures to me that not all non-autoloaders are bolt action. The .22 I'll be using is lever action, and I expect some folks may have .22 & CF pumps. Many are tube feed, thus won't support a magazine change. Also, some of the bolt actions may not have magazines and have to be single feed.
How about 10 sec off if you cant do a magazine change, and plus 20 sec if you have to do single feed.
This is getting complicated...input/suggestions are requested.