Finally ran the Boss across the chrony a bit

This more of a record for me to come back and check my shot string if I ever have a problem. Sorry, I'm old school with pencil and paper recording the velocities.

Here's my work station.

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And my target paper at only 28 yds. Too lazy to go out and put up new target. The target has been out there on the bullet trap for over a week and had already been shot a little. I'm surprised it didn't tear more than it did? It was windy and I wasn't taking my time and was shooting a 9 shot magazine per kz.

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I filled to 220 bar for the first session with the JSB 44.75 gr and decided to just fill to 200 bar for the next 3 sessions. Had a 3 errors and a crazy high velocity that I kicked out on the first session. Kicked out the high and low shot and the 3 errors for a total of 31 shots to avg. for a velocity of 879 fps and 76.8 fpe

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Then I tried the 50.15 gr JSB's . Kicked out the 26th and 27th shot since it was coming off the regulator. Had an avg of 848 fps at 80 fpe for 25 shots.

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Then a session with the Hatsan Vortex pellets just for giggles. 24 shots avg 877.8 fps at 76.58 fpe

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Decided to give one more go with the 44.75 gr JSB's with a 200 bar fill shot down to roughly 149 bar. 882.87 fps at 77.47 fpe for 24 shots

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So after all that I'm gonna call it 879 fps avg with 77 fpe for the 44.75 gr pellets and getting 80 fpe with the 50 grainers.

Might come back and edit in some more info later. Gotta make up my mind if I want to run the FX 500 across the chrony now or wait another day?


 
Do it now haha, you can put a Boss hammerweight in the R500 if you want a bit more snap too. Add a high pressure Huma and it'll really bark. Fine tune with the HST adjuster.

Boss and R500 use the same valvepin.


Thanks for the heads up Glem. Might go that route one of these days!

Fuss

Can get 60-65fpe without much trouble and wont affect your 45fpe tune much. (Might lose a few shots on the reg not really noticeable)
 
Glem, I think I'm gonna leave the 500 alone. I just got over 70 shots on a 200 bar fill at 45 fpe. When I need more power, I'll just grab the Boss.

I averaged 895.5 fps at 45.2 FPE over 71 shots. Chrony had one error on first shot and I kicked out the 5 shots past number 72 as it was falling off the reg. If I filled to 220 bar I could get 80 shots easy! Think I'll stop at 125 or 130 bar from now on!

Had no idea it would get this many shots on a 200 bar fill or I would have started with bigger paper?

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10 shots per group except last one. Shooting while recording across chrony. Windy as heck and changing directions often. Shot at just 28 yds. Had a few nice 5 shot groups that got ruined as I continued to 10 shots!

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Got this baby from Ken over at Spaw on the used gun rack. She's a keeper!

Fuss