7x64 Brenneke, The Wundercaliber

[jgonzalez]

Wild boar

 

[jgonzalez]

And black antelope

 

[CBH Australia]

Fallow doe , 7x64 mauser 66 @ 170m 135 atomic
View attachment 626392

Would you be happy to share your load data or powder choice?
I have the projectiles. I can’t find published 7x64 data and there is possibly no published data for that projectile .

 

[264]

Would you be happy to share your load data or powder choice?
I have the projectiles. I can’t find published 7x64 data and there is possibly no published data for that projectile .

RWS case, rem 91/2 primer , adi 2209 52 gr, 135gr atomic
Accurate and works well on game.

Use 280 rem. data

 

[CBH Australia]

RWS case, rem 91/2 primer , adi 2209 52 gr, 135gr atomic
Accurate and works well on game.

Use 280 rem. data

Thanks,
I’ve been reading .280rem load data .
supplied load is using AR2213sc with the 162 ELD-x but I can easily try the AR2209 with the 135 Atomic 29
Thanks again

 

[yamoon]

I don’t own a 7x64, but do own a 12ga over 7x65r, I have had it about a year but haven’t fired it yet.
Mike

 

[CBH Australia]

@264

Just wondering if you measure the jump to the lands with the Atomic 29 projectiles

I found all but one of the projectiles pictured below are out of the case before touching the lands.

I’ve read up on it and it seems the long free-bore may be by design from older ammo having round nose projectiles.

I’m keen to test a couple of projectiles for accuracy and hopefully in the field.

 

[264]

Overall length of loaded atomic 135 for my rifle is 82mm, so 2mm less than recommended.
Magazine length will dictate length.

 

[CBH Australia]

Overall length of loaded atomic 135 for my rifle is 82mm, so 2mm less than recommended.
Magazine length will dictate length.

Thanks. Mine is a Tikka and Tikka magazines are known to be short. Probably to Saami orCIP specs but they restrict the handloader who would like to seat further out.

What I have found is on this particular the Tikka the 7x64 is that the freebie in the chamber is quite long if I have explained that right.

I have not loaded these yet but if I seat any of the projectiles pictured other than the 162gn ELD-X they will be seated a long way of the lands and will have a long jump to the lands. To the point of they will be well clear of the case before they engage the lands.

This has been measured using a Hornady measure.

This is a the only rifle I have that I have found this. From the little I can find online the 7x64 has a long throat and it seems this is a standard set by the older rifles and military cartridges of the time.

That’s how I understand it and how I’m reading it but it f someone can see something different please help me.

 

[CBH Australia]

The Snap cap tops out at 83mm
The magazine internal is 84mm
The Atomic 29 can be loaded at 82mm+

The thing I can see or measure is that all of these have a long jump to the lands in this magazine

 

[Longwalker]

I believe that seating a bullet just short of engaging the lands is only required when a chamber is cut with some slop in the diameter of the chamber sides and the sides of the freebore/leade. It is a hand loading practise that is commonly required for good accuracy when rifle manufacturers make chambers that are sloppy and with variable tolerances. IE: most modern cartridges and rifle designs. The ingenious design of the 7x64 does not require such frippery.
The long freebore in 7x64 rifle chambers is a feature, not a flaw. Snug fitting, parallel sides to the freebore portion of the chamber ensure that a bullet gets an easy start for low pressures, aligns straight and parallel with the bore, and maintains excellent accuracy regardless the length of bullet used.
And that's how it has worked out in practise for several 7x64 rifles that I have had the pleasure to own and load ammunition for.
Load 'em up and go kill stuff. The 7x64 will deliver excellent performance on game.