Re: LE agencies using something besides .308/.223
Fdkay, first off I just want to say you're a stand-up guy for making that type of commitment to your agency. Thats a ton of time, money, and dicipline for a man to shoulder. I've been in SWAT for about 6 years and the last 3 have been as a Sniper. I feel fortunate that my agency takes care of us as far as equipment and training, but after I made it through Sniper School I realized that the entry side of our team sees most of the love, and then we get whats left. I'm not complaining, its just the way it is. So I've had to get creative to be able to supply my team with some of the gear that Sniper's know is "must-have", but the people with the money sees as wants. So, to a small degree I feel your pain.
We are issued the 700 LTR (.308)/Bi-pod, Leupold VX III, rails, AN PVS 22 NV's, and Ammo. Everything else is our own to buy. Also, we have a small team (less than 15) and we lost a brother last week, so we have to cross-train with entry, so we also have to be creative with training time as most of our scheduled training days are spent on entry. Now I'll quit with all that and talk about what you want to talk about (Can't help being long winded, you struck a cord).
As some of the others have said, policy is king. If you have a loose policy as far as Sniper's are concerned, my suggestion is to reach out to other agency's in your area and see how their's are written and develop a policy that suits your team. Its been my experience that command staff is somewhat understanding as far as this is concerned. Most of the time they just aren't sure what you're capable of, and this doubles as an opportunity to get an attentive ear as far as your equipment problem is concerned. Just make sure your "guns" are loaded. You can show what other agency's are doing and it never hurts to have some stats onhand for re-enforcement. I suggest you check out the American Sniper Association if you're not already a member. There is a wealth of knowledge to be had there, and they are some of the nicest people you would ever care to deal with.
As far as your caliber choice is concerned, I don't see any harm in testing an alternative since you are the one footing the bill. It boils down to what you have confidence in, and what you have proven to work (DOCUMENT EVERYTHING). Everyone has been right in my opinion about intermediate barrier penetration. This is where our biggest challenge comes. Whatever round you test needs to be fired through as many types of glass as you can get your hands on. I have found that auto glass and window companies in my area have been very helpful with giving me broken and cracked windows and glass to train with. They will call me and all I have to do is go pick it up. I just took some time to explain what we were doing with it, and most of the time they were just going to throw it away anyway.
I am close to most of the teams in my area, and everyone runs .308's with some teams also running .223's in populated areas like apartment buildings as an alternative. Our team got lucky enough to go to the Swat Roundup International comp. last go-round, and most of what I saw there was .308. There was a Russian team there that was running .338 lpm, but I didn't get to talk to any of them about it. On a side note, I did meet a team from Garland Texas (not sure if thats anywhere near you) and they were some good guys.
I hope this helps some, and if theres anything I can do to help you just let me know. I don't know a lot, but I've got some great resources and friends in this arena.
Stay safe bro...