Just get a Canadian P.A.L. (and register your shotgun under their long gun registry) if you're going up there on a regular basis. It makes customs a snap. With the PAL you can buy ammo or even a gun with no problem. You can also carry 200 rounds into Canada in baggage, having it shipped may be different. I just buy it up there. To bring a gun you purchase in Canada back to the US is more of a problem...Geo