Recent content by ericf

Results for today using three different weights of pells using 8 shots over chrono H&N rabbit magnum II @ 25.31 gr. Slugs. hi 885.3 ; lo 877.7 ; MAD- 2.6; ES 7.4 ; AVG. 883.1 H&N Baracudas @ 21.14 grn. Pells Hi 949.7; lo 943.2 ; MAD 1.9 ; ES 6.5; AVG 945.7 JTS...

More information. The regulator in this rifle has no sticker nor identifying marks. I marked the factory setting and turned it 90* inward. The average velocity after re-tuning the trigger to the new setpoint dropped to 946fps. still using the H&N 21.14. The setpoint drop-off is now about 125...

Any idea regarding how far to adjust? I have read that to reduce pressures it should be screwed in, Increase - unscrewed. But how far? One guy on YT vid says that one full turn is equal to about 30 bar. I'm not so sure about YT vids. The pressure appears to be about 140- 150bar setpoint. Any...

ok, just for information. After shooting 40 pells through the rifle, I came to these figures. I think the final would be much better because the last shots had reached 150 bar in tank and I'm sure that is where it is set to. These pellets were 21.14 grn H&N Baracudas which is heaviest I have...

As per UA, In the enclosed "shot" information with my new Katran, they were shooting an AEA 25.3 grn. pill and getting 915fps average. It's still a little fast, I think. Why can't manufactures just put an external adjustment for regulators on these rifles. It would make life so much simpler.

OK. to summarize all this information that you guys have given me (very much appreciated) and videos and reading articles. The regulator , hammer spring tension (setting) and Pell size all have a direct correlation on each other. The perfect "Tune" places everything in a static balance. If...

Update, I talked quite a long time with UA. I was advised that the "HP" version is factory set up for heavier slugs. I knew it had a larger plenum but I am not sure what else is done for that "Setup". He advised to try heavier slugs. I inquired about heavier skirted pellets and he wasn't able to...

Going on maximum hammer strike and a velocity recording I could begin reducing spring pressure till velocity changes with a slight reduction. At that change perform the 97% reduction rule and set velocity with slightly reduced spring pressure. Would this approach be workable? It would appear...

I consideration of the details, would it be plausible to just increase the hammer tension to maximum and check velocity over several shots. Accuracy would be nill, but velocity should be constant. Is this a correct assumption? It would give me insight into a regulator issue if velocity changes...

"The katran. Even a superb gun like mine was/is. Will have giant spreads if the hammer is set incorrectly. The katran is very sensitive to this." So I can better understand, If the hammer setting is the issue, and I am able to get a decent setting on the hammer, the velocities should stabilize...

I'll be giving UA a call today. Maybe they will give me a "Deal" on a new regulator. Regarding the tuning. I did more research into the "how and what" and tuning appears easy enough albeit a little time consuming. One thing that's not going to work is that the velocities are all over the place...

https://americanairgunner.com/the-beginners-guide-to-tuning-a-regulated-pcp-airgun/ I found this too. I'll take it all into consideration.

ok, I'll give it another "shot" (pun intended) in a few days. I'll back down the hammer spring a couple of complete turns. but what am I looking for when increasing and firing a few, (rinse and repeat). Am I watching for the highest vel. achieved using the hammer spring adjustment? Wouldn't the...

I very sparingly lubed up the hammer spring , spring guide, guide strut and hammer pivot pin. I went back to my chrono and started low and fired one shot noting vel. about 1/2 turn increase and fired again. I did this till velocity no longer increased. The velocity for a 18.2 grn. diablo...

shot sound is relatively quiet (compared to my other AA-s410) which isn't moderated) . I just re-chrono'ed and over 14 shots these are the figures. Hi-971.3 Low-898.4 SD-19.5 CV-2.05% ES- 72.9 Avg. 947.1 I can shoot 4 magazines through it and pressure drops about 50 bar. I'm not familiar with...