17 HMR HeadSpace Dimentions?

[Leeroy]

G'day All

Can Anyone tell me (Or where i might find) the dimentions of a set of 17 HMR headspace gauges?
If i know the sizes i can make myself a set. I have looked at the SAAMI site and done several GOOGLE searches and found nothing!
I would have thought that this information should be readily avaliable?

Cheers
Leeroy

 

[Dennis Sorensen]

I'm guessing here but wouldn't it be the same as the .22 Magnum...?

Parent case .22 WRF

Base diameter .241 in (6.1 mm)
Rim diameter .291 in (7.4 mm)
Rim thickness .046 in (1.2 mm)

 

[cntryboy1289]

I think it is closer to .053 on the 17HMR/22mag case, slightly larger than the 22Lr/17Hm2

 

[Leeroy]

Thanks

G'day Guys

Thanks very much for the replies.
Are these sizes (0.046 0.053) average case sizes or min/max headspace?
I have measured a few .22 magnum cases and they are arround 0.046.

Thanks again

Leeroy

 

[cntryboy1289]

You will find some larger cases and will have to take that into consideration.

I cut down my 22lr headspace to .043" and I will cut my 22mag headspace down to around .048" but I will also measure the case heads to make sure they will function.