This week I am trying to scour online blogs for all of the photos & data that I can find for new ammo at SHOT show, which is going on Tuesday 19th, to Fri 22nd. Yesterday the 18th was range-day, so lots of info on guns has been posted already.
The best one is probably The Firearms Blog TFB: http://www.thefirearmblog.com/blog/ for lots of listings with photos
Most interesting thing so far is this .510 Beck cartridge:
It is marketed & sold by Beck Defense (aka Beck Ammunition - formerly “Right to Bear Ammo”), to fire from AR-10 platforms, and is likely a .499 diameter projectile and appears roughly the same as .499 LWR, and .50 Beowulf. I am not certain if Beck Manufacturers it after having cases provided from Starline or wherever, or if they are having Lehigh produce it, they don’t say. They have magazines custom made by Lancer, and are touted as being “straight walled” cases which somehow helps with a legal classification for hunting in certain areas. The projectiles are Lehigh, although the TFB blog post doesn’t mention this, and the Beck website only has an out-of-stock listing with limited info, mentioning a release date for the ammo of Spring 2016: