I think airguns will experience a natural progression into slugs. However, there are a couple limiting factors. At this point in time, few slugs are economically competitive with pellets. NSA - 2 sample packs + S&H resulted in 200 rounds at $0.2248 per round. Hunter Supply purchase of 200 rounds resulted in $0.0903 per round. H&N Grizzly - My last order of Grizzly's resulted in $0.05 per round. For comparison, JSBs - My last purchase of JSBs resulted in $0.0382 per round. I can shoot powder burners like a 22 LR at $0.0537 per round. Another limiting factor is not many airguns handle slugs well. More manufactures will have to focus on selling slug airguns. It's possible FX efforts toward slugs will drive the market, but it remains to be seen if FX can successfully create accurate slug barrel liners or if those liners will last. Regarding blurred lines between airguns and powder burners, check out the muzzle FPE generated from powder burners. Rim fire - http://www.gunnersden.com/index.htm.rimfire-rifles.html Center fire - http://www.gunnersden.com/index.htm.rifle-cartridges-ballistics.html Handgun - http://www.gunnersden.com/index.htm.handgun-ballistics.html The most powerful PCPs on the market are the Seneca Dragon Claw 50 cal and Umarex Hammer 50 cal. Both generating around 700 FPE. EDIT: Bad info (700 FPE is roughly equivalent to one of the lowest powered powder burner rounds made (a 22 short). )
You're way off on the energy of a 22 short
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