The NEF Handi-Rifles are currently chambered for the following calibers.
"High Intensity Centerfire Cartridges": .243 Win, .270 Win, .280 Rem, .308 Win, and the old .30-06.
"Low Intensity Centerfire Cartridges": .22 Hornet, .223 Rem, .30-30, .357 Mag, .44 Mag, and .45-70.
Shotgun barrels: .410, 28, 20, 16 and 12ga.
Here's how it works. If you buy a Handi in any of the "High Intensity Centerfire Calibers", you can have it barreled to any low intensity cartridge or .410 to 12ga they offer. The "high intensities" are carefully fit on the SB-2 frame. Fit is extremely important in these calibers!
If you have a Handi in any of the "Low Intensity Calibers" the same is true. However you can NOT get it fit with any of the "high intensity" barrels. The low intensity frames also use the SB-2 frame.
The "Pardner" uses the SB-1. A "pardner" in any gauge can be fit with any of the shotgun barrels up to and including 12ga. 3 1/2" Mag versions.
If you think you'll ever want one in one of the "high intensity" calibers, start there first.
Regards! DaMan
[This message has been edited by DaMan (edited August 27, 2000).]