I recently bought a Blaser S2 double in 500/416. Here's the problem. It only wants to be fed WR ammo. Any other type of case ( BB, LFB) will not let the barrels close when the right chamber is loaded. The left chamber is no problem, though.

What I can see is that the lip that supports the rim is slightly shallower on the right chamber (maybe .001 in.) than on the left, causing the cartridge rim to sit a smidge higher and stopping the barrels from closing. Has anyone got a double in this caliber and can you tell me what ammo you shoot? WR pricing is $170 for 10 rounds. I can reload for under $5 per round.

Yes, the gun has been back to Blaser USA. Their gunsmith's comment was "I dunno"! He's no longer there!

I'm supposed to take this thing to Botswana for Buffalo in the long grass in April. If I can't trust it, I'm sending it back to Blaser along with five pounds of fine white sand and a gallon of 10-30 oil.