Page 1 of 1
Headspace Gauge ?
Posted: Mon Feb 09, 2009 10:11 am
by Rich V
I''ve been using a bushing die on all my .204 reloads. I know that soon, I'll have to bump the shoulders back a few thousands. I have a Stoney Point headspace gauge kits that contains a bushing for measuring .222 Remington mag. cases. Since the .204 is made from this case, resizing the neck. I don't know if the shoulders were changed. Can I use the .222 Remington Mag. bushing to measure the headspace on my .204's?
Re: Headspace Gauge ?
Posted: Mon Feb 09, 2009 10:20 am
by Rick in Oregon
Rich: The 204R although made from the same parent case, has a 30 deg shoulder compared to the 23 deg shoulder of the 222RM case. Just use a once fired case from your rifle with the Stoney Point headspace tool, measure, then set your die to match the once fired case.
The datum line on the 204R and 222RM will be different. The shoulder on the 204R was also moved forward by Hornady when developing the new round, and that fact alone would make the two case measurements void for using the same data.
Re: Headspace Gauge ?
Posted: Mon Feb 09, 2009 10:33 am
by Rich V
Hey Rick.
Thanks for that info. I started looking for some case dimensions on the two cases but couldn't find the .204.
Re: Headspace Gauge ?
Posted: Mon Feb 09, 2009 4:11 pm
by jo191145
Rich
If that gauge says .330 on the side then yes it is the correct one.
Any saami dimensions you find for any case are meaningless to you.
The measurement your looking for is the specific headspace on your rifle.
Using your gauge measure your fired brass. Set your die to bump the shoulders back .001
Check for easy chambering and your done.
Re: Headspace Gauge ?
Posted: Tue Feb 10, 2009 9:09 am
by Rich V
jo191145 wrote:Rich
If that gauge says .330 on the side then yes it is the correct one.
Any saami dimensions you find for any case are meaningless to you.
The measurement your looking for is the specific headspace on your rifle.
Using your gauge measure your fired brass. Set your die to bump the shoulders back .001
Check for easy chambering and your done.
jo191145
That's exactly what I had in mind. The gauge .330 comes so far down, I can't tell if its on the shoulder or the case. I did call Hornady and the Tec. wasn't to sure about it , but did finally did say it would be OK to use the .330 gauge. I also have thought of shimming the shell holder.