I’ve already found a fill station At my local scuba dive shop instead of buying a tank they will rent me one For the weekend for $12 the tank not fiberglass it’s your standard scuba tank so for being a weekend shooter It will stand in my garage
If its regular alu tank, its gona be 3000 psi. You not gona get 1 full fill from that tank. You still gona be able to shoot some, but it's not gona be much, especially in 25.
Not exactly correct...
When a scuba tank gets its hydro its filled to 5000-6000psi and expansion rate is noted as part of the hydro test. Many/most good newer tanks or good very old tanks will pass test with low expansion rate allowing for a 10% service factor. What that means is now a shop is legally allowed to fill the tank to 3300cold psi. So most shops fill to 3400psi (when legally allowed) hot, to allow for cool off psi drop...
My local hydro shop charges $5 for a fill, a fill is included with a $29.95hydro. After last fill my tank cooled to sFL temps and had 3420psi. I always end up with over 3300psi.
I own a .22 and a .25 Mrod, great guns that can keep up with many guns costing 2x. Can fill my 22 at least 8 times before scuba tank gets below 3000psi. And even then, a 2900-2700psi fill is fine on a mrod. I mostly fill to 2900-3000psi and shoot down to around 2000psi. And if it goes down to 1700psi, wouldn't hesitate to take a pesting shot that will hit dead center head and will pass thru the head of a nutter no problem. The highest fps on my 22 is at 1700psi. With a 3000psi fill my 22 Mrod will do 6+ mags that are fine for pesting. My .25 is more air hungry than the 22, but if you tune it for what you need and no more its not to bad, 25-30fpe is more than enough for small fur bearers <50yards ime.
So to summarize, a scuba tank filled legally to 3300psi will give you over a dozen fills to 2700psi, with at least half those fills at 3000psi.
IMO a scuba tank is a ok option for an Mrod, considering its the cheapest, most durable, longest lasting, can get at least a dozen good fills and used tanks are cheap. It is heavy though compared to a SCBA.
Never owned a Hatsan but shot a few of them. They seem like a great gun also but have no real long term experience with them like with the Mrod...
jmo