scubajeeper said:

Time will tell. With a plenum, the pressure would remain stable, with the reservoir over the barrel and the pressure changes that naturally happen, I’m wondering how this would affect harmonics. The stiffness this system could add would be a big bonus though.

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AmosBurton said:

Wouldn't there be a wild change in pressure as you pull the trigger? I would think before and after a shot it's stable but during? What piece of info am I missing?

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bchannell said:

I think air pressure surrounding the barrel would be a good stiffener and damper, but I also think that the changing air pressure and expansion/contraction of the air cylinder during pressure changes "could" affect point of aim, especially from shooting session to session. As we've seen on some guns with solid barrel bands, bending of the air cylinder can cause poi shift problems.
Time will tell.

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Peashooter said:

But i often see talk about air around barrel might induce POI change or at least fluctuations in POI, i can not see why that should happen, the air pressure are the same on all sides of the barrel, and drop just as fast on all side of the barrel when shots are made.

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weevil said:

This guy was taken at the base of my neighbors yard at 85y with the WC having sat for 2 days. My neighbor has problems with the squirrels storing walnuts in the attic, which required some expensive cleanup, so he encourages me to text him for clearance to nix them. This one had his back to me, stooped over, chowing on a walnut, so a headshot was not on the cards, but he was backed by a tree, so the opportunity to shoot safely was deemed better than waiting for him to move. I went for the upper spine and the slug was right on the point of aim with projected holdover. It exited through the mouth and the squirrel died instantly. Obviously a pass through, but at 56fpe, most things will pass through unless I’ve missed the discovery of the magic projectile. I’ll refrain from showing the mouth shot but it’s clear that the slug had greatly expanded by that time, traveling around 3 inches.

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JungleShooter said:

I'm not sure I would require Altaros slugs to be "lead free" (that's a whole different thread on environmentalism ).


But I sure would like to see Altaros (or any other manufacturer) to offer something with a dream BC of 0.2 ➔ but a bit lighter than the ATP 49.5gr (.25) slugs.


Because I like compact guns — which makes it hard to get heavy projectiles up to speed.
(But then again, that's just me and my compact obsession. I will probably get at least one comment from you guys telling me to get a life and get a dedicated slug gun with a proper 700mm barrel. And you're probably right. )


Matthias

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