Have you patterned them to see if the pattern % are correct to the tube markings?
That is, of course, the proof of the pudding. However, if the bores are indeed what the website claims, I can see no way a tube with an I.D. that is .004"
larger than the bore is going to throw an IC pattern. The F, IM and M tubes might pattern close to what they should, but not the IC.
That said, I wouldn't get upset too quickly. If I liked the gun I would pattern all the tubes, see what looks to be the most useful, and stick with them. Screw in chokes are way overrated anyway, IMO.
SRH
