You don't come right out and say it, but this sentence makes me think that you think using the recruits as a test bed is a bad idea. Why do you think that? The way I see it, a novice is a perfect test subject. If they can work the gun without trouble then anyone could.
I understand your point and it does have merit, but my question is whether you really want the least familiar shooters evaluating guns for an entire agency? If the new shooters (assuming they are 'green' shooters) don't have solid fundamentals and the problems being experienced are actually shooter errors and not mechanical problems, you could be complicating the evaluation process and potentially drawing the wrong conclusion. Could a FTF/FTE noted really be a limp wristing problem, or maybe the rookie shooter is simply riding the slide? These would seem less problematic variables to consider with experienced shooters. Just like I wouldn't expect an inexperienced driver to articulate the nuances of an understeer/oversteer condition with the same insight as a professional driver, I think more meaningful information would be gleaned from a pool of seasoned shooter evaluating a new platform than one where the testers were still struggling to grasp the basics of shooting.