No mention effect of magnumitis on desirability and sales of older doubles. Without handloading, it's abuse to use majority of my American and European classics for my needs. I'm limited to 20 SKB and 12 Beretta 686 with TM and bismuth. Kent's catalogue says TM is "safe to use in nitro-proofed, high grade, fixed choke barrels" and bismuth "suitable for use in all shotguns including those with fixed choke barrels." They are superb loads but their pressures and velocities are unnecessary---generally.