New Howa Mini Action in 7.2x39

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Re: New Howa Mini Action in 7.2x39

Post by eddahenry » 24 Dec 2018, 8:36 am

SCJ429 wrote:Very interesting to see your data. I know nothing of this case but it is similar to the 30 BR. With that case you can stuff 34 grains into it and get velocities around 3,000 fps with a 125 grain projectile. Are you able to get much more powder into your cases?

I see what you are saying about the .310 bullet from Hornady. The ZMax is half the price of the SST so I wonder where they save the money. In a .224 the 50 grain ZMax has a cannulur but the Vmax does not, not sure what Hornady was achieving putting it there.


Not with 2207 ,, i am not showing Pressure but there isnt the case cap left to get to 34 , i dont think 2207 is the powder to push it with.
Buy all the data flowing around CFEBLK is the powder to try , its a ball powder so will stack nice , and makes the best on paper velocities the big problem is there isnt any in WA
but just resizing some cases than ill trim than get a average Water capacity for the cases (starline) than i can get some data flowing in Quickload
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Re: New Howa Mini Action in 7.2x39

Post by SCJ429 » 24 Dec 2018, 2:33 pm

Please keep us posted, it is a very interesting case. All the bench rest shooters use stick powders, usually with a burn rate equivalent to 2207 for their 30 BR. Are you anywhere near a compressed load with 25 grains?
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Re: New Howa Mini Action in 7.2x39

Post by in2anity » 24 Dec 2018, 5:32 pm

How’s the ffp scope - you use it over dialing in?
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Re: New Howa Mini Action in 7.2x39

Post by eddahenry » 25 Dec 2018, 8:57 am

in2anity wrote:How’s the ffp scope - you use it over dialing in?

yeh its s hunting gun so sight in at 100 and just use the holdovers on the recital ,, as they are consistence in a FFP scope
and the nice this with the 1-4 power is at 1 power it is just like a red dot so quick shots up to 100 are easy as
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Re: New Howa Mini Action in 7.2x39

Post by solarpak » 27 Dec 2018, 6:00 pm

eddahenry wrote:shot it some today
Shot well with anything really but the 123 SST Z-Max (same thing) come up nice at full charge
prob go up buy .2 grains to see if i can tighten up the SDs
7.62group.jpg

7.62.PNG


Edda,
nice work there... a pal and myself are in the process of loading up some 7.62x39 hunting loads using the Z Max Zombie projies. Initially we will be pulling FMJ bullets from steel cased norinco loads and seating the z-max's in these - and seat them at an appropriate depth. We have a good supply of the norinco loads and these loads with the replaced projectile should do the job.
But good to know what powder and charge weight you used.

Cheers
CK
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Re: New Howa Mini Action in 7.2x39

Post by eddahenry » 31 Dec 2018, 3:22 pm

So decided to give myself 100% certainty that he .310 123Gr Z-Max are in fact .310 123 Gr SSTs not Vmax as everyone says
Here it is
they are indeed the same bullet
123 SST Left
Woodleigh 160gr rn.centre left
140SSt centre right
123 Zmax right
SSt123WL160SST140Zmax123.png
SSt123WL160SST140Zmax123.png (1.84 MiB) Viewed 90 times

great news because i can use the cheap Zmaxs from Cleavers until they run dry than just switch to the SSts
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