To fit or not to fit? Barrel fitting question

[krod47nw]

I just got a 30-06 barrel.  Here is my question.  It locks up perfectly on one of my receivers.  The receiver it fits is a pre 99 SB2 NH prefix.  I got the receiver new with a 223 barrel. Later had a 45/70 fitted by H&R on it.  I know they won't put a 30-06 on it, but is it safe for me to?   Is there a physical strength difference between these and the post 99 models?   Should I use it on this receiver, or would it be better to refit it to one of my later ones?  I have fit barrels before, and have no problem doing so if it is necessary.  What do you guys think?

Thanks,
Kevin

[quickdtoo]

Pre '99 frames don't have the same heat treatment as later frames, they're weaker, that's why they won't fit any of the high pressure * marked barrels to them.

Tim

[krod47nw]

That's kind of what I thought.  I'll just have to fit it to one of my later frames.    Thanks Tim..