i have my dads 340e hornet. it cost 67 dollars brand new in 1967 lol. the trigger is comparable to a economy 22. it requires a side mount, there are two versions around, one has more space between the rings and helps with eye relief. both require older straight tube, small objective scopes. it had a steel weaver that went bad. i replaced it with a older banner (bushnell). accuracy is on par with a marlin 22mag of today. also the chamber is on the generous side.
....for the older guys a varmint cartridge meant small less noise than a full size deer gun. most definitely not the accuracy desired nowadays. of course the 222 remington changed all of that.....sorry for the book but i wanted you to have a good idea of the gun,,,,,for me it is dearly prized...MY dads gun. bobn