dmachine, I cannot vouch for the the 1-10x24 March. I can however attest to the quality of the 10-60x52 March. They are widely regarded as THE glass to have in the BR world. The one that I sat behind, was shooting a 6BR at 600yards. Granted, this was on a bright crisp morning, and no mirage, but it was not difficult to resolve 6mm holes in the target at 600 yards.
There will be some guys that tell you I'm full of BS. Fine. But do me a favor and go over to 6mmbr.com and look for yourself. The guys that own them all say the same thing. 6mm holes can be resolved at 600 yards with the right atmospheric conditions. The only other scope I think could do that would be a S&B 12-50. There is a great, non biased comparison on the two, again at 6mmbr.com.
All that being said, I don't know how they would work as a tactical platform. Their BR platforms excel to say the least. You best bet would be to call Kelbly's and talk to them. I'm sure they can give you the skinny on March products and the lowdown on the 1-10x24. Otherwise, I think their are entire threads about March products over on 6mmbr.com. You can read up and probably make a better decision.
Unfortunately, most the 1x scopes have tiny OBJ. That goes across the board. I don't know of any large OBJ 1x scopes, but 1x scopes are not my thing, so, again, I'm not well informed and cannot say for sure.
Good luck figuring out what to buy! There are just lots of great options as MFG processes have come a long ways over the last 20 years.
Thank you for the info. I'v never even heard of these scopes until now and know nothing about them. USO, as we all know, is a great scope and you can build it YOUR way. I wish they had the 37mm obj. for the SN-4 (28mm is the only offering) I would have to go to the SN-3 to get the larger obj., but the lowest power goes up. Seems to be aprox. $500 more to go with the March over the USO, I just wouder if it's worth it. If I do get one I'll do a write up for everyone so they to will know more about them. Thanks all!