Getting some trigger time with the Compatto

Earlier last year I was trying to decide if I "needed" a Compatto. I had put one in the shopping cart on various occasions at a few different sites, but could never push the "buy" button. I had settled on buying an FX Streamline in .177 but it was out of stock. I had one on backorder for about a month and then the Brocock Bantam was relased and for a breif time the Compatto went on sale. At the same time, I traded into a .22 Streamline so I canceled my order for the .177 and bought a Compatto in .177 when it was on sale. 
This little gun has been amazing. It has the slingshot hammer system and was very accurate. After having it for a few months they came out with a HUMA regulator for it. I was wanting to know what a regulator would do with this already efficient slingshot system. I ordered one and was excited to put it in.
That was when the struggle started. The guns must get some sort of corrosion or a white flaky locktite put in them and tightened by a silverback gorilla. It took several hours and an insane amount of force to get the air cylinder removed from the action. After that it took even more force to remove the adapter from the airtube to be able to insert the HUMA. We're talking hitting vice grips with a hammer to try and break free the adapter. After finally getting it apart and installing the regulator, set at 110 bar, I put in a shorter hammer spring as well. I have it set to shoot the 10.3 JSB's around 810 fps. I don't have a full shot string yet but here are some groups I did with some washed and lubed 8.4 grain JSBs. 
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Box 13 is a 10 shot group at 20 yards, indoors, shooting off sandbags and a plastic picnic table. They were shot numbers 20 thru 30 on the fill. The square is 1 inch by 1 inch. The next two targets are 5 shot groups at 20 yards. #25 is shots 40-45 and #24 is shots 46-50. The low one is the last shot, probably off the reg. 
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I figured this was good enough for now and headed out at lunch break to the shed filled with corn to combat hundreds of collared doves that have taken up residence and brought all their relatives. This next picture represents all the birds that I could recover. A few were up in the rafters that didn't come down.
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All these were taken between 20-50 yrds. I am really happy with how this is turning out. I have a little work to do on the trigger, right now there is a little creep in the second stage. All in all, I think that if you want a regulated Compatto, buy the Target version and avoid the huge headache but it's a shooter for sure. 
 
That is only a start! Yesterday, I parked at my permission about 100 yards away from the cattle paddock (they fly as soon as they see my car!!), and walked to my favorite shooting spot wearing all camo clothes. I managed to get 9 before they all flew. 

I really don't have any kind of idea how many collared doves reside in Chaves County New Mexico. If I had to guess, I'd say well over 500,000. Next time I can sneak up on a group , I'll take a photo or two as I think folks just might be amazed at the numbers. 


 
How does the slingshot hammer system interact with the regulator? I have a Daystate Huntsman Regal, and I have heard from some tuners that installing a reg in Daystate rifles can present some problems with the regulator function. 

I've seen so few people install regs in Daystates that I am just curious what you are getting with your Compatto since I think they share many components. 
 
Hey guys thanks for the comments. To answer your question, BeachGunner, the HUMA and the Slingshot work very well together. I have emailed Brocock to ask about the differences in doing it the way I have done and the new Target model. They emailed me back and said that the Target has a slightly different Huma in it, but that just installing the version that they sell for aftermarket would be all I need to do. I could tell that it was wasting alot of air per shot, thats why I put in a lighter hammer spring. There isn't a way to adjust the hammer spring tension, just a screw that goes through the hammer that will adjust how far open the valve will go, similar to the hammer on a Marauder. I will try and get a shot string over the chrony later and post what I find for consistency. 
 
TylerE how far out is your that screw from the hammer, I installed the huma in my compatto but it's also wasting a lot of air! I didn't quite understand leaving the air tube a quarter turn loose, adjusted everything it seems and no luck now I don't remember the factory length, I've put the compatto on hold for a while till weather warms. Thanks Steve 
 
Hey Element, I'll check when I get home on the screw length. Leaving it a quarter turn loose allows the reg to "breathe". Also pulling off those two orings allows the reg to breathe through the threads. I read where a guy in the UK drilled a small hole through that collar so he could tighten it back up and still vent the reg. I also put in a lighter hammer spring as it was still wasting air when I backed the hammer all the way out. I have it shooting the 8.4 grain Jsb pellets at 854 fps. I ran it over the chrony and got 51 shots on reg with an extreme spread of 14 and a SD of 4.5 fps. Interestingly, when it came off reg, the slingshot system still stablized it for another 30 shots. If I took the whole 80 shots I had an extreme spread of 25 and a SD of 4.9. I am trying to remember exactly those numbers, as the paper is at home, but I will correct the info if it is way off. I was pretty impressed to say the least.