So, About Bore Size Again...

[Josh Smith]

Hi Folks,

I keep reading that the bore size in the Gewehr 88 is supposed to be 0.321" bore by 0.311" or so lands, and that the 0.318" bullet was a holdover from the blackpowder days, but that it was found this caused unacceptable gas erosion so they bumped the bullet to 0.323" to fit the bore.

Now, I've been shooting and cleaning, shooting and cleaning.

First time I slugged the bore I got 0.3165". Now I'm getting 0.318".

That's all well and good -- the crud's gone.

But, why are folks saying these are 0.321" by 0.311"? I do have the "S" conversion.

I'm sort of confused. Any help would be appreciated.

Thanks,

Josh

[Mssr. Eleganté]

I thought the Gewehr 88 originally was barreled for the .318 version of the cartridge. Then the G98 came out and was barreled for the .323 version. Then the remaining G88s had the S conversion done to make them safe with the .323 projectiles. So your rifle might not have been converted.

[Peter in CA]

Does your barrel have a "z" in a circle on it? If it does, it is a Czech made barrel, which were reported as being made at .318". If it is a Czech barrel, then what is stamped on the receiver no longer applies.

Peter in CA