Thnks for the reply's, I was headed back out tonight if i have another lot number of ammo but sounds like i should get a hold of weatherby before i go to much further. Have a hunt in 10 days hope to...

No factory weatherby ammo, 180 gr partitions?

I have a weatherby mark v ultra light in 300 weatherby mag and in the last few sessions at the range i have had a problem with my bolt being stuck down after the shot. Not every shot maybe 1 out of 7...