Always walk in refills you get here, you can also rent bottles, the norm is the shops sell you a 10 turn card, this are for refills or tank rental, what ever you like.
I personally figure a smaller compressor, well the wear and tear will be the same if you fill your 500 CC bottle XX times over a weekend, or you boost your single larger bottle back up to 300 BAR from the 260 or what ever you have sot it down to.
The only difference being that you have 1 long pump session VS several shorter ones.
TBH i am not sure what the shops here consider a fair tank rental period, i know a weekend are no problem, and the shop i use to get filled at, well they have at the very least 50 large 10 L bottles ready to go, and at least in the .22 and .177 i am used to handle, you will have to shoot pretty much constantly Saturday and Sunday to get those down to where REG fall off might be a issue.
My Maverick i have the first REG set to 120 - 130 BAR so when my big bottle reach 150 or so, i break out my Vulcan 3 rifle for the rest of the month as its single regulator are set to 100 BAR.
And as i always shoot connected to my bottle, well it dont matter much if i dont get the rifle bottle up to its maximum,,,,,, CUZ having to charge air 2 X as often would be a drag indeed, even if my small caliber rifles get many shots on a full 300 BAR fill.
Of course if you shoot a bigger caliber, well your air use go up of course, but then so do your ammo cost, and i doubt very many .30 cal shooters sit there at the bench and just pour tin after tin thru their rifle like i do with .177 ammo.
BTW i have ditched getting the 2 cylinder Tuxing compressor, i will get their 4 cylinder one that cost 1600 EURO instead, i figure it will be fairly safe in regard to spare parts, and as somewhat of a mechanical multi "artist" i will have no problem doing any repairs that might come up.
I just can not justify going all the way to 2300 EURO for a nice Italian Coltri compressor.
