Your rifle and homeowners insurance..
I know of an individual that had this happen, using the wrong powder in his rifle. It was 7mm also. He had Allstate homeowners insurance. Just like the guy that cut down the tree and crashed his roof in, they covered him for a brand new rifle since he had 100% replacement and his rifles were insured for the standard 10k per policy unless you get a higher value rider.
They had to make a ruling from Boston, Ma. home office, said they never had a claim like this..people usually don't survive. Explosion- covered under policy, rifle insured under policy - yes, 100% replacement cost. Stupidity - that what insurance is all about. The 8.5x25x50LRT was replaced also. The guy is lucky to be alive and he had used 4227 and it was Weatherby Mark-V Accumark too. The bolt held but the half of the face, extractor and 2 lugs were gone, blew all out the bottom and some topside which took out the scope.
Maybe you are covered too. Doesn't hurt to check, your in the same boat if they say no. Good luck!!