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Vintage_Canvas
.275 member


Reged: 18/02/20
Posts: 63
Loc: Western Cape, South Africa
M72 in 9.3x64Brenneke need loads please
      #380881 - 03/12/23 04:36 PM

Morning all
I manage to lay my hands on a M72 MS in 9.3x64 Brenneke, and need a load please for this caliber?
Although its not a pure MS like my other rifles, I got it for a good price... Would love to get a older model in this caliber, but as far as I know there is only 1-2 in SA that I know of?
I have 100 new RWS brass, 286gr Nosler Partitions, 286gr Horndady SP Interlocks, and 286gr PPU SP bullets. I would like to use powders that is available in SA if possible. Currently I have the following available:
Somchem S335, Somchem S365, Somchem S385
Norma 202, Norma 204, Norma MRP
Vihtavouri N540, Vitha N550, vitha N560

Might be able to get IMR or Hodgedon but would only go that route if no other way...

If someone have data for the Norma and Vihtavouri powders I would appreciate?
I also read about duplex loads with the Somchem S335 and S365, where put 50% of each in the load, first the S335 and then the S365? I am a bit scared for this practice!! But both these powders on there own do not give me the performance that I need for the Brenneke! Cannot get over 2400f/s without pressure signs...
If I can just get over 2500f/s, then I would be happy!

--------------------
"the real Africa is still out there... you just need to know where to find it"

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93x64mm
.416 member


Reged: 07/12/11
Posts: 3987
Loc: Nth QLD Australia
Re: M72 in 9.3x64Brenneke need loads please [Re: Vintage_Canvas]
      #380897 - 04/12/23 06:46 AM

VC
I had data for you, hopefully this will help below?
Will have to try & find data in QuickLoad
http://forums.nitroexpress.com/showflat....true#Post313481
Doc's data & article are very good

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Rule303
.416 member


Reged: 05/07/09
Posts: 4917
Loc: Woodford Qld
Re: M72 in 9.3x64Brenneke need loads please [Re: 93x64mm]
      #380899 - 04/12/23 07:44 AM

Quote:

VC
I had data for you, hopefully this will help below?
Will have to try & find data in QuickLoad
http://forums.nitroexpress.com/showflat....true#Post313481
Doc's data & article are very good



I was going to suggest he PM you

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93x64mm
.416 member


Reged: 07/12/11
Posts: 3987
Loc: Nth QLD Australia
Re: M72 in 9.3x64Brenneke need loads please [Re: Rule303]
      #380937 - 05/12/23 06:47 AM

Any luck VC finding a load yet?

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Vintage_Canvas
.275 member


Reged: 18/02/20
Posts: 63
Loc: Western Cape, South Africa
Re: M72 in 9.3x64Brenneke need loads please [Re: 93x64mm]
      #380943 - 05/12/23 04:05 PM

Hi guys, thank you for the links! I have scanned through them, but we are limited with components in SA. I will take a good look in the next few days.
I manage to go to the range and got the following results all with Hornady 286gr SP bullets and Remington Large rifle primers in RWS new brass:

S365 65gr @ 2109f/s
S365 66gr @ 2158f/s
S335 55gr @ 2265f/s
Norma 202 50gr @ 2011f/s
Vihta N540 50gr @ 1979f/s
Vihta N550 54gr @ 1922f/s

these are all just start loads! Looks like the S335 and Norma have potential as the loads is very low?

--------------------
"the real Africa is still out there... you just need to know where to find it"

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93x64mm
.416 member


Reged: 07/12/11
Posts: 3987
Loc: Nth QLD Australia
Re: M72 in 9.3x64Brenneke need loads please [Re: Vintage_Canvas]
      #380951 - 05/12/23 11:24 PM

VC
I've run Quickload using Somchem S365
71gn (lightly compressed) using the Hornady 286gn gives 2577fps at a guestimated pressure of 50KPSI.
64gn Somchem S335 with the same projectile gives 2526fps for a guestimated pressure of 63KPSI.
Shows that S365 is too slow & S335 too fast - but whatever you can get in SA might be all you can achieve!

64gn Norma 202 gets 2583fps for guestimated pressure of 62KPSI (worth a further look at)

When I tried 67gn Vihtavuori N540 with the Hornady 286gn it gives 2578fps at a guestimated pressure of 61KPSI - still a bit fast I think but still a good contender.

However!
73gn Vihtavuori N550 (lightly compressed) with the Hornady 286gn gives 2693fps at a guestimated pressure of 62KPSI.
This was the real surprise!

I would definitely try this as the best performer as to what you can get in SA!
We can't get this powder here in Oz, but if we did I would certainly give it a crack!
Take all precautions going up in small increments as this info is only a "guestimate" but it should point you in the right direction & give you a basis to work towards.
I wouldn't use magnum primers here in this case as powders required are of the medium type only.

By the way I ran your load of 54gn of N550 & it can back with 2036fps for approx 26KPSI.
All these loads have been calculated with a 26 inch barrel - so allow approx 25fps less per inch of barrel.
So rather close indeed!

The 9.3x64 can get well over 2600+fps for a 286gn pill & a solid 2570fps for the 293gn TUG, but you have to use powders that suit the cartridge/bullet combination to achieve the best ballistics for a given maximum pressure; but this must also be on the proviso of accuracy as well.
Some powders/bullet/primer combinations in your rifle might get the velocity, but be like a shotgun & spray them everywhere - lets hope not for N550!

I hope this helps you in your endeavours - go slow & stead & watch for pressure signs.
Best of luck mate, keep us informed
93x64mm

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DarylS
.700 member


Reged: 10/08/05
Posts: 26514
Loc: Beautiful British Columbia, Ca...
Re: M72 in 9.3x64Brenneke need loads please [Re: Vintage_Canvas]
      #380964 - 06/12/23 03:50 AM

Quote:

Hi guys, thank you for the links! I have scanned through them, but we are limited with components in SA. I will take a good look in the next few days.
I manage to go to the range and got the following results all with Hornady 286gr SP bullets and Remington Large rifle primers in RWS new brass:

S365 65gr @ 2109f/s
S365 66gr @ 2158f/s
S335 55gr @ 2265f/s
Norma 202 50gr @ 2011f/s
Vihta N540 50gr @ 1979f/s
Vihta N550 54gr @ 1922f/s

these are all just start loads! Looks like the S335 and Norma have potential as the loads is very low?



Those are quite a bit sub-par for starting loads, imho.
A model 96 in 9.3x57 makes just over 2,200fps with 286's quite easily. I did 2,170fps with 300's in mine with ZERO case WEB expansion on a full length sized case.
Lots of data on this thread is sub-par, even for a 9.3x62 with fairly modern powders.

Good luck with that 286gr. Hornady. Guys here have noted the blow up like 270 gr. Speers, even on deer.
Norma makes a good 286gr., as does or did RWS. The Speer Grand Spam will be decent as well as the Noslers.
If you had a die to size down .375's, that would open up the bullet availability.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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Vintage_Canvas
.275 member


Reged: 18/02/20
Posts: 63
Loc: Western Cape, South Africa
Re: M72 in 9.3x64Brenneke need loads please [Re: DarylS]
      #380969 - 06/12/23 04:19 AM

Hi guys.
thank you so much for your trouble! 9.3x64 I appreciate you effort with quickload! I make use of Gordons reloading tool, but its not the same as QL.
I will try N550! Remember these were all bare minimum loads for each powder, as I had no info to work from! I started with 10% less than the minimum loads that I guess from simular powders loads...

also take note I only used the Hornaday bullets as a starting point not to waste my Nosler Partitions and PPU 286 SP bullets. We have a equivalent of Barnes bullets here, that is made locally and I want to give them a try as well! For hunting loads I will develop a load with the Noslers or the local Peregrine or Titan bullets.
My end goal with this rifle is to hunt a buffalo next year! So I want to play around with combinations in the meantime, and velocity is important to me for this... otherwise I might as well just use my Krieghoff 9.3x62 that I am used to and really shoot well!
At least I have some data to work from now!
thanks again guys and will keep you posted!

--------------------
"the real Africa is still out there... you just need to know where to find it"

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DarylS
.700 member


Reged: 10/08/05
Posts: 26514
Loc: Beautiful British Columbia, Ca...
Re: M72 in 9.3x64Brenneke need loads please [Re: Vintage_Canvas]
      #380976 - 06/12/23 08:29 AM

Good luck with the loads.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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9.3x57
.450 member


Reged: 22/04/07
Posts: 5504
Loc: United States
Re: M72 in 9.3x64Brenneke need loads please [Re: Vintage_Canvas]
      #380996 - 07/12/23 01:26 AM

Good you have Nosler Partitions.

I suspect the 286gr Hornady SP Interlocks, and 286gr PPU SP bullets will be very explosive at the velocities you can drive them. I've not used the Hornady's in 9.3 but have in other calibers. VERY accurate but soft.

That is discussed at some length and repeatedly in this excellent (tho repetitive) book:

https://93x62journal.co.za/

I use the 285 Prvi in the 9x3x62 on deer and elk and like it a lot, tho I do not expect full penetration on any angling shots on elk. I'm running it at 2400 fps in my 22" bbl Sauer 100. I killed two more elk this year and no exits.

--------------------
What are the Rosary, the Cross or the Crucifix other than tools to help maintain the fortress of our faith in Jesus Christ, the Son of God?

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