They come stock in the 800mm tensioned barrels kits or at least they did? The liner twist rates have changed more times than I can count and are usually not published! So don’t ever believe what you are told until you see or measure it for yourself
at least in the last 6 years when they started stx from Smooth twist.
The .25 altaros 50 gr works well in 700mm in the slug gun. The .22 40 grain works well in my basically stock impact with the 800mm or in 700mm in my slug gun. At least thats the way I remember it.
25 - 100 yards. I just made a little 94 yard range at my uncles house across the street today. I have been just shooting at 25 yards at my house. I can't wait to stretch it out. Oh man I wish you remembered that tune for the 40 grain altaros out of the 800mm 1/14 twist. I have the tungsten hammer and the slug kit and 720 power plenum too. They had it pre-built for a few months at utah airguns, they called it the slugger edition. Got so back ordered they had to take it down. Took over a year to get it. Do you remember the velocity you were shooting those 40 grain altaros feom the 800mm 1/14 ? I know they don't need to be as fast as most slugs. I will take boring bulls eyes any day ! LolThe .25 altaros 50 gr works well in 700mm in the slug gun. The .22 40 grain works well in my basically stock impact with the 800mm or in 700mm in my slug gun. At least thats the way I remember it.
This may sound weird but my .22 800 mm shot so well with the altaros that I got bored and it is basically why I decided to go to .25 And boy it took a long while for me to get the .25 to work. Probably because I started with the 60 gr first. The 50 gr was a lot less dramatic.
At what distance do you plan to shoot?
Allen
I will give them a shot with the tungsten hammer. They are definitely pricey though. If I can't get them to shoot accurately with the tungsten hammer I will try the NSA 38 grain - HN 40 grain - ZAN 40 grain - GRIFFIN 40 grain match & dish base hollow point & boat tail and any other 40 grain I am forgetting. I have been wanting to get a .22 caliber 40 grain slug flying accurately so I can show some of the guys at the local rifle range what these new air rifles can do. If you get out there with the altaros slugs let me know what your settings are. I am just having a hard time with the 2 different hammer spring settings along with the valve, I'm not to into tuning just shooting. Is there a strategy you use to tune the M3 ?
I as well always shoot tethered, I keep the inline external regulator at 220 bar and my first regulator at 190 bar and my second regulator at about 150 bar. I was thinking about bypassing my first regulator as well. I might buy the Saber tactical first regulator bypass right now, it shouldn't harm the rifle at all seing I always shoot tethered with a external regulator. The plenum takes forever to fill and it screws with my rhythm. If I'm gonna shoot the 40 grain altaros I will have to keep my hammer spring really low or lower my regulator. My micro adjustments for the hammer spring seem to make a huge difference in velocity, I thought the micro adjustments were supposed to not make much of a difference. I can have my macro wheel maxed at #16 and turn my micro adjuster to #1 and I'm only getting about 650 fps. Then turning up the micro to just #3 and I'm shooting over 1,000 fps. It seems like no matter how low the macro wheel is at I can get over 1,000 fps. By just adjusting the micro to around #3. Do you have a tuning strategy for the M3 or recommend any specific videos on tuning instructions ?
What about the altaros 40 grain at 890 - 900 fps. Can I do that with the 800mm 1/14 twist and the tungsten hammer ? I was gonna try a higher regulator pressure with less hammer spring tension but if it's not gonna work I will just stick with the Javelin 40 grains and NSA 38 grain till I can take out the tungsten hammer. If I do. Need to take out the tungsten hammer for the altaros 40 grains could I still use the 800mm ?
