I have a Benjamin 397 from 1995, and a Benjamin & Sheridan Blue Streak .20 from the 1960s, both belonging to my grandpa and given to me when he passed. He was the one that showed me the joy of airguns...Anyways, both are very good. The .20 has a limited selection of pellets and costs more. The .177 has significantly less power than the other two. The Benjamin 392 really packs a punch on small game and you can use heavy pellets and they will give more fpe most of the time. I suggest the 392, and always keep it oiled!
The difference in velocity is not because of the diameter of the pellet. Your numbers provide the answer just plug in the missing variable--pellet weight. At 685 fps a 14.3 gr pellet gives you 14.9 FPEAt 675 fps a 14.3 gr pellet gives you 14.47 FPEAt 800 fps a 7.9 gr pellet gives you 11.2 FPEThey tested both the .20 .22 caliber gun with the same weight pellet. Nothing wrong with that it just looks weird. Your used to seeing pellet weight increase when caliber increases.
I have what I believe are SOME of the best and baddest Benjamin and Sheridan rifle IN THE WORLD!!!!!!Don't you think it is kind of rude when you tell someone that their post means NOTHING when they take the time to TRY to help you and answer question(s) that you asked... As you stated in your original post the gun in the photo's IS THE EXACT SAME GUN!!!In fact, the guns,except for the caliber specific parts, i.e. barrel, bolt, and bolt oring are IDENTICAL!!!!The price difference is probably politically related from when Benjamin bought Sheridan and Crosman bought both of them. Sheridans have always cost more it was probably part of the DEAL..... The biggest drawback with the Sheridan other than price is pellet availability. Being that the .22 and the .20 use the exact same powerplant, if you are shooting the same weight pellet the .20 should shoot farther flatter because of it's smaller diameter. And will make almost the same FPE in 'real world testing'....Caveat emptor (buyer beware)... Advertisers lie or stretch the truth all of the time... Knowledge is the unfair advantage.If you plan to use your rifle for any kind of hunting or if you are considering power mods don't even waste your time with the .177. My modded 392 makes very close to 24ftlbs... The .177 does not accept power mods near as well.. In my opinion the only reason to buy a .177 is price and availability of pellets. Greg
I have what I believe are SOME of the best and baddest Benjamin and Sheridan rifle IN THE WORLD!!!!!!Don't you think it is kind of rude when you tell someone that their post means NOTHING when they take the time to TRY to help you and answer question(s) that you asked...
Lambo Guinea!
Quote from: jdub on October 16, 2012, 06:11:27 AMThe difference in velocity is not because of the diameter of the pellet. Your numbers provide the answer just plug in the missing variable--pellet weight. At 685 fps a 14.3 gr pellet gives you 14.9 FPEAt 675 fps a 14.3 gr pellet gives you 14.47 FPEAt 800 fps a 7.9 gr pellet gives you 11.2 FPEThey tested both the .20 .22 caliber gun with the same weight pellet. Nothing wrong with that it just looks weird. Your used to seeing pellet weight increase when caliber increases. Your putting way too much stock in factory numbers. It is really more like this;.177 with 7 grain is 800 fps.20 cal with a 10 grain 685.22 cal with a 11.9 grain 675
Tim, how much is a 397 or 392 tune on a new gun? And what does it involve?