Sorry for not contributing sooner or more constructively to the original topic. I'll try to make amends on this one. ok, for quality, collectability, and performance: I think your top five is pretty darn good, though I don't have any experience with the Kessler (but it sounds pretty great). I might add the benjamin Sheridan H9 pistols (in any caliber), while performance isn't mindblowing primarily because of the smaller size, they certainly have quality and collectability going on. They are built every bit as solidly as the benjamin and sheridan rifles in their prime, and their performance is better than any of the previous versions of benjamin pump pistols. Their going price has gone through the roof lately. If you had one to sell, you could make stupid money on it - particularly the nickel finished ones. I guess unless you are specifically and intentionally ranking .22 cal versions over .177 cal (due to a performance edge), I might advocate for lumping the racine 347, 342, 397 and 392s all together (you already have the .22s lumped). also, just as a housekeeping thing you have sheridan 397 listed somewhere below. that's not a thing. The 397 is a benjamin (though the differences blurred more and more in later years).
If they don't have to be production models, I would respectfully submit my .25 cal Millenium Pumper.... Based on a Disco tube, with a 392 Billet linkage, it would deliver three shots of 40 FPE with 25.4 gr. JSB Kings before needing to be repumped.... Alternately, it could be tuned for two shots of 45 FPE, or a single shot at 50 FPE.... If I'm out of line, then I apologize, but remember the gun was made with primarily Crosman/Benjamin parts, and intended that if Crosman had so desired, could have been produced with a minimum of fuss and bother.... The only special part required would have been the addition of a check valve inside the Disco tube.... Food for thought.... Bob
I agree with Billy on ranking the .177 versions of the same rifle with their .22 brethren.Racine .177s (397P and '78-up 347) with 392P and late 342; 397PA with 392PA; 317 (and 310 if you include smoothbores) with 312, etc.
Since the 1377 and 1322 have been disqualified, I'll suggest the 1300KT. About double the price. But comes with choice of barrel length, 3/8 grooved steel breech, and shoulder stock.