Starting to feel like winter here in Western Massachusetts, so I'm looking at the airguns again. Bicycling is definitely out.
My Crosman 114 is one of my favorite guns. Very light, inexplicably accurate, and at 12 fpe my fourth most powerful hitter. I rarely take my guns out of the house, but if I were to go on a hike the 114 would be my first choice.
(Haven't tried posting a picture since that thing happened, so this is the first try with Imgur.)
My 114 question is this: I've read recharging the CO2 works best when the gun is colder than the tank. Does it matter how great the temperature difference is? Tonight I put the gun in the chilly back entry and it seemed to charge just great. Probably a 15°F difference. Would I get a better result with a 25°F difference?
Second question: Just finished reassembling a Crosman 1400 third variant, and I sure struggled with the roll pin that's the main pivot for the pump. Do the roll pins become less cooperative with age? Would a new pin compress more easily and drive in more easily? Is there a ready source for black roll pins? I can find shiny, but would prefer black.
The roll pin on this one fought me coming out and going in.
I have three, shoot them all the time. Having the gun cooler than your CO2 tank definitely helps in getting a good fill. Sometimes, I remove the gun from the stock and shove it in the fridge for 20 minutes or so before filling. Other times, I'll immerse my 20 ounce paintball tank in a bowl of warm water for a bit. You don't want it to warm, of course. My two favorite 114s are crazy accurate. I have put stronger hammer springs and lighter trigger springs in them, both wear vintage Weaver scopes, they are great shooters.
Roll pins are supposed to fit tight, if they didn't they would come out to easily. I hate whacking on them but it's the nature of the beast. I found an assortment box at Harbor Freight pretty cheap, they are black.
To answer your question, a 25 degree difference between tank and gun will probably result in a better fill than 15 degrees. Heck, I probably go for a 30 or 40 degree difference. I have also noticed it's easier to get a good fill when your CO2 tank is closer to full.