9.3x62 with the 325gn Oryx

[RLL]

I think you found a good node with your 3rd and 4th loads. I’d play with +/- 61 g to hopefully find a sweet spot with RL17 at ~85F. After that, tweaking seating depth should dial you in. Good luck!

 

[shootist~]

My Lapua 9.3x62 brass only hold 74 grains of water.

 

[K95]

Could it be 78.1 grains of water? 88.1 grains seems outside the normal variation

When I looked it up Wikipedia said 88.1 grains of H2O ?

 

[K95]

When I looked it up Wikipedia said 88.1 grains of H2O ?

These are RWS cases which should not matter as they are the only ones that make them to my knowledge.

 

[K95]

Could it be 78.1 grains of water? 88.1 grains seems outside the normal variation

 

[shootist~]

To get the H20 volume, take a case that was fired in your rifle. Do not decap.
Weight it.
Fill with water containing a tiny bit of dish soap. Dry the outside. Weigh again.
Get the difference in the two weights.

 

[K95]

To get the H20 volume, take a case that was fired in your rifle. Do not decap.
Weight it.
Fill with water containing a tiny bit of dish soap. Dry the outside. Weigh again.
Get the difference in the two weights.

Ok difference is 85.1 gr

 

[Rimshot]

Ok difference is 85.1 gr

I'm sorry K95, I am stupid. I thought we were talking about 9.3x62, but I put it together with the 64k PSI MAP you mentioned earlier and case capacity, and I realized you are talking about 9.3x64 Brenneke!

I just used 70 gr as an arbitrary "nominal charge" and let QL map out 2% increments below and above that. Used the 85.1 gr water overflow capacity with Nosler partition seated to 3.550 OAL.

Cartridge : 9.3 x 64 Brenneke
Bullet : .366, 286, Nosler Part. 44750
Useable Case Capaci: 76.353 grain H2O = 4.958 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Alliant Reloder-17 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 85 63.00 2302 3365 37973 8795 98.7 1.438
-08.0 87 64.40 2352 3512 40424 8954 99.2 1.397
-06.0 89 65.80 2401 3661 43041 9096 99.6 1.356
-04.0 91 67.20 2450 3812 45835 9221 99.8 1.317
-02.0 93 68.60 2499 3965 48822 9327 100.0 1.280
+00.0 95 70.00 2547 4120 52016 9416 100.0 1.244
+02.0 97 71.40 2595 4276 55439 9497 100.0 1.209 ! Near Maximum !
+04.0 99 72.80 2642 4434 59106 9576 100.0 1.175 ! Near Maximum !
+06.0 100 74.20 2689 4593 63041 9652 100.0 1.143 ! Near Maximum !
+08.0 102 75.60 2736 4754 67267 9725 100.0 1.112 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 77.00 2783 4917 71814 9795 100.0 1.081 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 95 70.00 2649 4457 63417 9007 100.0 1.152 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 70.00 2392 3634 42187 9567 97.0 1.364

 

[shootist~]

Ok difference is 85.1 gr

But that's not not for a 9.3x62, apparently.
I have no idea if RL17 is suitable for the 9.3x64.

 

[K95]

I'm sorry K95, I am stupid. I thought we were talking about 9.3x62, but I put it together with the 64k PSI MAP you mentioned earlier and case capacity, and I realized you are talking about 9.3x64 Brenneke!

I just used 70 gr as an arbitrary "nominal charge" and let QL map out 2% increments below and above that. Used the 85.1 gr water overflow capacity with Nosler partition seated to 3.550 OAL.

Cartridge : 9.3 x 64 Brenneke
Bullet : .366, 286, Nosler Part. 44750
Useable Case Capaci: 76.353 grain H2O = 4.958 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 23.0 inch = 584.2 mm
Powder : Alliant Reloder-17 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 85 63.00 2302 3365 37973 8795 98.7 1.438
-08.0 87 64.40 2352 3512 40424 8954 99.2 1.397
-06.0 89 65.80 2401 3661 43041 9096 99.6 1.356
-04.0 91 67.20 2450 3812 45835 9221 99.8 1.317
-02.0 93 68.60 2499 3965 48822 9327 100.0 1.280
+00.0 95 70.00 2547 4120 52016 9416 100.0 1.244
+02.0 97 71.40 2595 4276 55439 9497 100.0 1.209 ! Near Maximum !
+04.0 99 72.80 2642 4434 59106 9576 100.0 1.175 ! Near Maximum !
+06.0 100 74.20 2689 4593 63041 9652 100.0 1.143 ! Near Maximum !
+08.0 102 75.60 2736 4754 67267 9725 100.0 1.112 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 77.00 2783 4917 71814 9795 100.0 1.081 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 95 70.00 2649 4457 63417 9007 100.0 1.152 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 70.00 2392 3634 42187 9567 97.0 1.364

Rimshot
Thank you for running those figures for me. Having both the 62 and 64 cartridges years ago I had a rough idea where to start but that was with IMR powders which are no longer available. Here in Aus we are very restricted to what powders are brought in. At present there is Hodgson which is made here and Alliant powders that I have been using for years. I have test loads with Rel 12,15,16,17,19, all with 1 gr increments to check when I can. Rel 17 works very well in my 375 Ruger having high velocity with low pressures. I was thinking it should have similar characteristics in the 9.3 x 64. I have always found that the 64 has roughly a 225 fps advantage over the 62 and with tougher projectiles extra speed assists with expansion especially once the range is extended.
I was thinking somewhere in the 70 to 74 gr range is where I would end up and your data confirms that is a reasonable assumption. Past data was a 293 gr tug at 2625 fps.
Thank you for all your help and I will forward to you all my results with all powders.
Ken

 

[dchamp]

I was able to shoot my OCW today. Here are my results.

 

[Rimshot]

@dchamp Assuming no sighting changes while shooting the groups, looks like 60.0 is close to the sweet spot for this combination!

 

[K95]

62 grs is looking ok as well, your not shooting rabbits will a 325 gr pill and the extra velocity and energy may help with expansion. Is 53,000 psi in the 9.3x62 within its limits. I really like Rel 17 and think it works well in medium bore cartridges. Attached is a target when I was working up a load for the 375 Ruger . Rel 15 shot well but 17 had lower pressure with a higher velocity. 77 to 80 grs all shot in the same group. 81 grs shot vertically about at 2700 fps. Still with no pressure signs. That was the load I decided on and it shoots brilliantly. Barnes are a great projectile but
can anyone tell me what velocity does a Barnes need to expand fully. I have seen a lot of recovered bullet where expansion was minimal, sometimes less that the bullet diameter.
Ken

 

[dchamp]

I am going to load 60.3 gn's and see how it does. I have a few reasons for this; 1. just plain intuition, curiosity. 2. The numbers along with the groupings look good and 3. After recording velocities and making adjustments in temperature in QL I noticed the Barrel Time was real close to a known node. Making the adjustment to 60.3 I should be even closer.
Barrel timing, at least for me, has been in the past frustrating with mixed results. Often when pursuing it I feel like I am chasing my tail, so I usually don't think about it. But here everything seems to be falling in place, hence my reason for 60.3.
For those of you who are interested here are a couple of links to Optimal Barrel Timing.
http://www.the-long-family.com/OBT_paper.htm
http://www.the-long-family.com/optimal barrel time.htm

 

[sgt_zim]

62 grs is looking ok as well, your not shooting rabbits will a 325 gr pill and the extra velocity and energy may help with expansion. Is 53,000 psi in the 9.3x62 within its limits. I really like Rel 17 and think it works well in medium bore cartridges. Attached is a target when I was working up a load for the 375 Ruger . Rel 15 shot well but 17 had lower pressure with a higher velocity. 77 to 80 grs all shot in the same group. 81 grs shot vertically about at 2700 fps. Still with no pressure signs. That was the load I decided on and it shoots brilliantly. Barnes are a great projectile but
can anyone tell me what velocity does a Barnes need to expand fully. I have seen a lot of recovered bullet where expansion was minimal, sometimes less that the bullet diameter.
Ken

View attachment 419020

TSX is quite broadly thought to need an impact velocity of 2K fps, I believe even Barnes literature says that. TTSX is said to open at a bit lower velocity of maybe 1800.

I think the 286 TSX is probably not a great idea in 9.3x62 unless all you're shooting will be inside 75-100 yards.

 

[Quaticman]

I shoot the exact same bullet in my
9. 3 x 62 Husqvarna however I am using Reloder 15. 2,300 fps with a premium 325 grain bullet should put a hurt on anything that needs to have a hurt directed it's way.

 

[K95]

Rimshot
Thank you for running those figures for me. Having both the 62 and 64 cartridges years ago I had a rough idea where to start but that was with IMR powders which are no longer available. Here in Aus we are very restricted to what powders are brought in. At present there is Hodgson which is made here and Alliant powders that I have been using for years. I have test loads with Rel 12,15,16,17,19, all with 1 gr increments to check when I can. Rel 17 works very well in my 375 Ruger having high velocity with low pressures. I was thinking it should have similar characteristics in the 9.3 x 64. I have always found that the 64 has roughly a 225 fps advantage over the 62 and with tougher projectiles extra speed assists with expansion especially once the range is extended.
I was thinking somewhere in the 70 to 74 gr range is where I would end up and your data confirms that is a reasonable assumption. Past data was a 293 gr tug at 2625 fps.
Thank you for all your help and I will forward to you all my results with all powders.
Ken

I was wondering how much Rel 15 you were using to achieve this velocity and do you know what pressure is created.

 

[CalinRO]

I would like to know some data for charge weight of RL17 and norma oryx 286gr and muzzle velocity for 9.3x62 and 9.3x64.
Thanks

 

[sgt_zim]

Gordon's reloading tool is showing for RL17 and 285 gr Oryx in 9.3x62, out of a 22" barrel, and a COAL of 3.25". Also assumes a case capacity of 76 gr H2O

59.3 gr -> 2289 fps
62.0 gr -> 2400 fps
62 gr is near the top of the pressure curve, tho

for 9.3x64 brenneke
69.3 gr RL17 -> 2455 fps
72 gr RL17 - 2560 fps

pressure curve is somewhat lower for the x64, could probably goose it a little, but honestly, do you really need 2600 fps with that bullet?

 

[Christot]

As you mentioned GRT: Gordon passed away and access to his software for updates is currently not available.

start [Gordons Reloading Tool Community]

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