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Not yet. He will soon.

All very good advice. I might add a focus on concentricity and axial alignment. I've built my own version of a true bore chuck that allows for these adjustments during setup. I find this alignment to be very important with regard to throat and lead. The possible deviation at the muzzle is...

Yes a standard would be very good idea

You probably won't believe this but many barrels have a OD to bore concentricity variation of about .003" to .005". I've seen upto .025" on cheap imports. And as low as .0003" on finer stuff. I make quite a few barrels every year (avg 30+). Also, a lot of makers don't make their cuts after...

This is actually for AEA Zeus 58/72 cal.

Just finished up a request from a buddy of mine. He wanted a muzzle break to reduce felt recoil. Don't know how effective it is yet since it hasn't been tried. It's gonna be a surprise to him because we just discussed it and never made plans to develop one. He wanted it to be much like the old...

What is the length of the portion that you turned to fit the receiver? I've been making barrels for these for a while now and havent had to reduce the diameter to fit the receiver up to this point.

Ok Impact guys. I need to know how much of the barrel is inside the receiver. Or, what's the measurement from the mag to the front of the receiver? I've been making barrel for these things and have recently began making them heavier. This means I'm going to have to turn them to the smaller...

If you have drawings, I can likely machine it. If not, It'll require some reverse engineering.

I'm late to the party but I can tell you that I get them in OD up to 15mm. 9/16 is what I typically use when making them for the Impacts. Lots of guys like them in 15mm when they go unshrouded.

Unfortunately no. I have recently gotten covered up with several barrel orders and picked up some industrial fabrication business.

Over stabilization does promote nose high attitude. It been published in multiple books and studies. Litz wrote a book detailing it. There are direct correlation between spin, velocity, CG, center of form and center of pressure. Velocity and center of pressure are strongly associated. The...

Unless the bullet is "over or under stabilized" the nose should follow the trajectory. the mentioned flight characteristic is arguably the only reason to not spin a bullet with a really fast twist rate.

When I cut the port, I typically orient the deviation at 12 o'clock.

Thank you.

IMO, the optimal velocity is subjective. What is the application, as in how much energy do you need and how much can your platform generate. In theory, I think 1050fps at 1.5 stability. If we can't go at least 2x the speed of sound, I don't see why even break the barrier. In practice, I have...

Are they digesting pellets, slugs, or both? What brand and weight are the projectiles? I'll give you a run down on my process. First off, I have made a lathe fixture that I made. It allows me to adjust the bore position, not only concentrically but longitudinally. I do this on 2 planes of...

1:17 or 1:17.5 is what LW has iirc. That was for their air guns barrels.

As for gyroscopic stabilization and pellets, most barrels are too fast for pellets. We can get away with it due to the hi drag. Over stabilized pellet flight get mitigated by the drag. So nose up attitude tends to get replaced by corkscrew flight path. This is exacerbated by poor center of form...

If you guys aren't familiar with Geoffrey-Kolbe.com you should check out his stabilization and drag calculators. Very useful tools. Check out his bio while your at it. The guy is an absolute ballistic geek. I'd say that most modern ballistic software is based off his foundation.