Back in the early '70's I started making centrefire suppressors commercially (probably the first) and the first few were over-barrel jobs on shortened .45/70 H&R Toppers. The barrels were shortened to about 14" giving an overall length of just over 30" without the suppressor, and fully assembled were the same length as the standard rifle. The rifles were 'scoped on the factory supplied Weaver base, and worked extremely well, especially with subsonic loads. They were surprisingly flat shooting with the big heavy lead bullets out to about 200 metres and flattened whatever they hit. I did quite a few of them before I started on other, more common, centrefire calibres, and then everybody wanted them! I have some photos of those early ones somewhere.
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