The strength issue concerning chambering the J-Frame to. 32 H&R Magnum in this very gun, the Model 631, which was made before the frame strengthening done to allow the J-frame to be chambered for. ![]() 38 caliber J-Frame revolver with a cylinder wall that is nearly 30% thinner! 38 Special +P loads that can be fired in the. 32 H&R Magnum Maximum Average Pressure specified by SAAMI is only slightly higher that. All this with not the slightest sign of damage to the revolver! A very slightly higher load with the same bullet will flatten the primers so they resemble full-pressure. Hundreds of rounds have been fired through with loads which probably approach 25,000+ PSI, possibly higher. I have been shooting a 1967 or 1968 Model 30-1 since it was purchased in 1968. The cylinders have been heat-treated for many years. 32 cylinder has a wall thickness identical to the that of the K-frame. ![]() While 2152hq's advice is in generally valid, it is, in this case, overly cautious.īased strictly on cylinder dimensions the J-Frame.
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