I just posted this to my facebook feed - copying & pasting in here too.
To those of you who may have purchased this barrel for this gun: At least for me, and my barrel, it really digs .217 sized slugs *UP TO* 23g in weight. If you want to sling anything heavier than 23g - try .216's. *DON'T ASK ME WHY* ( lol ) I've not a clue but after MUCH frustration I kind of accidentally discovered that .216's fly exceptionally well out of it (in heavier weights). At least one of the really good Jedi's in here alluded to me that I might try these too ( @mtnghost I'm thinking? ). So - long story short - for the time being I'm settling on the .216 27.5g NSA's. ( I picked up sample packs of the 27.5, 28.5 and 31.2's ) The 31.2's flew really well too but I'm thinking I might need a little more HS / need to use more air with those to get 'em up to a slightly faster speed. They flew good @923 but the group could have been a little tighter. Not changing the tune at all - I then tried the two lighter ones - the 28.5's were actually kind of a bummer. The 27.5's - holy crap - they were five shots touching grouping. Not the proverbial "hole on hole" - but dime sized at 40 yards. They were hands down the best of the three I tested. I'm still able to get 30 - maybe 35 shots out of them too from a 250bar fill @974fps. Not super efficient but not bad either I don't think. (?) So anyway - copy & paste in below of my fb post:
How about this weather 'eh?
Could it just stay like this through the end of March or so? So - super nice weather, me being curious like I can be and constantly dinking with stuff that didn't really need dinking with ( if it ain't broke . . . don't fix it ) BUT - you know. <grin> I wanted to get a little more power out of one of my .22 air rifles. A 700mm CZ barrel and a plenum magically showed up in the mail recently and so . . . re-tuning it to see if I could find happiness with a slightly heavier ammo that will fly further, buck the wind better and put the smack down on woodchucks next spring / summer. Check this - I've now got an *air rifle* putting out nearly 60 ft/lbs of energy in .22 cal. It's tough trying to get in any real time playing with it now due to lack of daylight so . . . I don't know that I'm going to be able to get it *really* dialed in like I had it before with the shorter OEM barrel but - it looks promising.
I hand wrote notes on the pic / target below which are pretty much self explanatory - once I figured out where I was initially hitting after the first two or three shots - I adjusted / dialed the scope and was then able to hit the target out at 101 yards at will. Easy peasy. Strelok (I misspelled it on the target) is a ballistics app that you can get from the google play / iTunes store. I'll have to figure out why that seems to be off - but . . . later when A) - I have ammo*, and B) - likely when it's spring time and the weather starts to improve again.
Link to info on strelok for those of you who might be curious as I know there are at least a few of you on my friends list who are shooters too.
http://www.borisov.mobi/strelokpro/android/default.asp
*I purchased a couple of 40 shot sample packs of ammo in different weights / sizes to see if I could find something that the gun likes. I did - but used up all of the sample set in the process. Now that I know what its going to like - I'm going to buy a box or two for next year and further refining / tuning.
To those of you who may have purchased this barrel for this gun: At least for me, and my barrel, it really digs .217 sized slugs *UP TO* 23g in weight. If you want to sling anything heavier than 23g - try .216's. *DON'T ASK ME WHY* ( lol ) I've not a clue but after MUCH frustration I kind of accidentally discovered that .216's fly exceptionally well out of it (in heavier weights). At least one of the really good Jedi's in here alluded to me that I might try these too ( @mtnghost I'm thinking? ). So - long story short - for the time being I'm settling on the .216 27.5g NSA's. ( I picked up sample packs of the 27.5, 28.5 and 31.2's ) The 31.2's flew really well too but I'm thinking I might need a little more HS / need to use more air with those to get 'em up to a slightly faster speed. They flew good @923 but the group could have been a little tighter. Not changing the tune at all - I then tried the two lighter ones - the 28.5's were actually kind of a bummer. The 27.5's - holy crap - they were five shots touching grouping. Not the proverbial "hole on hole" - but dime sized at 40 yards. They were hands down the best of the three I tested. I'm still able to get 30 - maybe 35 shots out of them too from a 250bar fill @974fps. Not super efficient but not bad either I don't think. (?) So anyway - copy & paste in below of my fb post:
How about this weather 'eh?
I hand wrote notes on the pic / target below which are pretty much self explanatory - once I figured out where I was initially hitting after the first two or three shots - I adjusted / dialed the scope and was then able to hit the target out at 101 yards at will. Easy peasy. Strelok (I misspelled it on the target) is a ballistics app that you can get from the google play / iTunes store. I'll have to figure out why that seems to be off - but . . . later when A) - I have ammo*, and B) - likely when it's spring time and the weather starts to improve again.
Link to info on strelok for those of you who might be curious as I know there are at least a few of you on my friends list who are shooters too.
http://www.borisov.mobi/strelokpro/android/default.asp
*I purchased a couple of 40 shot sample packs of ammo in different weights / sizes to see if I could find something that the gun likes. I did - but used up all of the sample set in the process. Now that I know what its going to like - I'm going to buy a box or two for next year and further refining / tuning.
