I've used a lot of reformed '06 cases from M2 ball in my 7.7 and can say that it does swell a bit above the web. I generally use them twice and then put them in the recycle bucket.
I've heard people swear they've run surplus '06 in their Arisakas but I have a hard time believing it. I tried and couldn't force an empty '06 case into mine. Well, I suppose I could if I was willing to take a hammer to the bolt...
The slot in my Type 99 is a little too wide for '03 clips, but they'll work if you don't get in a hurry. Arisaka clips (I wish I had some) might be too wide for loading a '03 rifle.
Proud member of the NRA and Texas State Rifle Association. Registered and active voter.