Sorry about your hand, and your Walther. Looks like it could have been a lot more serious.
I have 6 Walthers. None of them are rimfires. I can't speak for Walther, but I have a feeling they'll tell you that you're using ammunition way outside the pressure specifications the pistol was designed for. I quote from my manuals:
"Use only commercially manufactured with internal ballistic pressures which are in strict accordance with the specifications of the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI). If you are uncertain, contact your ammunition supplier for verification."
Further...
"Plus-P-Plus" (+P+) ammunition must not be used in WALTHER firearms. This marking on the ammunition designates that it exceeds established industry standards, but the designation does not represent defined pressure limits and therefore such ammunition may vary significantly as to the pressures generated."
As a manufacturer, Walther generally discourages the use of high velocity or "hot" ammunition in any of their firearms. This warning is in ALL of my manuals that came with my pistols. I don't think you'll get much sympathy from them about the damage to your pistol.
I have 6 Walthers. None of them are rimfires. I can't speak for Walther, but I have a feeling they'll tell you that you're using ammunition way outside the pressure specifications the pistol was designed for. I quote from my manuals:
"Use only commercially manufactured with internal ballistic pressures which are in strict accordance with the specifications of the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI). If you are uncertain, contact your ammunition supplier for verification."
Further...
"Plus-P-Plus" (+P+) ammunition must not be used in WALTHER firearms. This marking on the ammunition designates that it exceeds established industry standards, but the designation does not represent defined pressure limits and therefore such ammunition may vary significantly as to the pressures generated."
As a manufacturer, Walther generally discourages the use of high velocity or "hot" ammunition in any of their firearms. This warning is in ALL of my manuals that came with my pistols. I don't think you'll get much sympathy from them about the damage to your pistol.