The quest for lower power… again.
I started a similar thread some time back, perhaps even on the old site and fiddled around a lot with my tophat settings, etc to get a lot of shots…
I ended up with roughly 80 shots in .177 with a decent spread at around 14-15fpe.
Talked with Tony some time back about a restrictive spring retainer and have been testing it out… Good news and bad news…
Bad news first…. I am losing my touch with the hand pump!!!
Good news is obvious. With an 18 inch barrel in .177, I stopped chronying at near 90 shots… velocity using 7.9gr pellets was at a very, very consistent 940fps. PW set to 4 and tophat set… …in. A lot. Dont recall the measurement, but close to a RCH. I then turned the PW down to 1 and fired off at least another 30 shots to see what velocity would do and it was at a very, very consistent 918fps. 8)
I got tired of shooting after a bit and started to refill the tank. 200 bar fill down to 150 bar, just a touch over… NICE.
Mac1 was selling 12 inch .22 barrels a week or so ago for $25 or thereabouts, cheap enough that I got one to see what .22 12 inch would do with the spring retainer. Shot out several shots … 20 or so… and velocity is at 680fps with 14.3gr Premiers. High of 681 and low of 678… dont get much more consistent than that.
I dont know that I’ll be doing a complete string with it in .22 as I’m sure that it will shoot for a long time at that level. I’m thinking this will be a perfect 30 yard squirrel gun so long as accuracy is there, and I’ve no reason to believe that it’s not.
Thanks Tony…. definitely got a winner there for anyone looking to drop power in .177 to a reasonable level for a lot of shots and for .22 users who realize that sometimes less is more… *awaiting the jokes on that one*
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Size of the hole on the retainer…. no clue. Sorry, I didnt think to measure it prior to. It was pretty small though. Perhaps Tony remembers what the size was……?
Rob,
Nice post. What’s the hole size on the retainer?? Expect it is pretty small.
Tony is always instrumental in any work on my AF guns..haha… if he dont do the work himself, he has to put up with all my questions!
Actually, this spring retainer is easy (even for me) to put in. My only mistake was not using the proper spanner wrench to take it apart and so I ended up with a leak and had to redo it… after that, no worries.
Best thing about the thing was the consistency… really tight spread on it. Appears to be even more so in .22.
Rob, you are talking my dream gun dude !!! I have shipped one of my TSS guns off where it is being tuned right now. I have two other TSS’s and was seriously contemplating converting one of them from it’s current .22 cal to .177 cal once this other gun comes home. Now you’ve got me all fired up. Your post is spot on exactly what I was wanting by turning one of them into a .177 cal gun.
Did you do the work yourself or was Tony instumental in getting it to where it is ?
Who needs a micrometer valve! Sounds great. Just get a valve restrictor from Tony for lots of medium power consistent shots.
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update….
Put a 12 inch .22 barrel on the Talon with Anthony’s spring retainer…
680fps…. 50 shots later…. 679.9fps 25 shots after that…. 681fps….
So far, I am at over 75 shots with it and no more than a 4fps spread…. will keep going and see what I get. I’m only chronying ever so often and just enjoying shooting it.