Shell pressure is the key. If a loaded shell produces pressure that he gun is safe to shoot, then he is fine. Shells vary too much for it to be a blanket statement. I damaged a VH, 2.625" chambers shooting very heavy 2.75" shells through it. When the sear notch was slightly worn and the gun doubled with the very heavy loads, TWICE, so did my butt stock. Broke in 2 places at the wrist. Since most older guns, pre 1905 or so saw black powder and preassure build up was much slower, most guns never seen those spikes we put them through today.
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