Ok...can't figure this one out...Seems there are two "flavors" of HydraShoks and I can't figure out the difference. Cheaper than Dirt happens to have both so can anyone tell me the difference between these 230 grain 45 ACP's catalog # P45HS1G at $28 for 50 rounds...

http://www.cheaperthandirt.com/AMM515-18942-207.html

and these 230 grain 45ACP's catalog # P45HS1 at $21 for 20 rounds

http://www.cheaperthandirt.com/65887-7484-207.html

I mean I get volume discounts and all but something don't add up here....ballistics on the two appear to be identical...the first one says it's a LEO round but I can't tell the technical diff between the two. Nor can I explain the dramatic cost difference? Anyone?