(Login leadgonads) Crosman Forum Member from IP address 184.108.40.206
New guy here; well, not completely new. I used to log on back when I owned one of the Sam Yang big bores.
I've since sold that rifle and moved onto smaller calibers and break barrel guns.
Here are a couple of the questions that I hope some of you more experienced DIY'ers can answer.
(1) Do any of you guys know the actual force it takes to compress the gas-piston/gas ram on one of the new break barrel air rifles equipped with this technology? I'm not referring to the cocking force of the assembled air gun; I mean the actual gas spring itself.
(2) What is the rifling twist of your typical .177 and .22 caliber air rifle barrels?
(3) Have any of you ever tried to calculate the actual volume of air expelled in a single shot from an air rifle equipped with one of these gas springs?
Why all the stupid questions???
The short answer is; I'm thinking of building my own air rifle. I haven't decided if it will be a break-barrel or an under-lever type. I have been kicking around the idea of making it a twin-cylinder/gas spring so as to be able to shoot a slightly larger caliber but, before I get ahead of myself I'd like to find the answers to my three questions.
I know that in every forum, regardless of the subject matter, there are members who are self-appointed know-it-all-armchair-smiths. And, I also know that there are those who really know their stuff. I hope to get input form the later group of members if possible; and since this is my first post here, I'd even be happy to get input and ideas from like-minded do-it-yourselfers.