9.3 x 62 and the 320 grain Weldcore

[sgt_zim]

Woodleigh doesn't recommend any COAL, it's up to the reloader.

Simple way to do it. Get yourself a 0.25" wood dowel about 4 feet long, an engineering pencil, and your caliper

Close the bolt, stick the dowel in from the crown until it reaches the bolt face. Inscribe a circle on the dowel at the crown. Then open the bolt, drop the bullet you need to figure out COAL for down the throat to where it is seated in the lands, then gently run the dowel back up the barrel, stopping when you meet the resistance of the bullet. Inscribe the dowel at the new stopping point, then measure the distance between the first and second lines.

You will probably want to do this 8 or 10 times, then average out what you get. Then subtract 0.02 to 0.04 from that. Just measure the magazine length and make sure that will fit in the mag, and you should be good to go.

 

[sgt_zim]

Hodgdon has a 3.150" COAL for a 300 gr., what I assume to be the HDY/DG, but that is not a true RN.






Red

Hornady shows a COAL of 3.115 for the 300 gr DGS

 

[Red Devil]

Hornady shows a COAL of 3.115 for the 300 gr DGS

Just found where Norma has a COAL of 3.228" for the Weldcore 286 gr. RNSP, which has to be near as matters the 320 gr.




Red

 

[sgt_zim]

I'd still do the dowel measurement. You'll likely be quite surprised at how much longer you'll be able to make them.

Yeah, norma also shows 3.228 for the Orxy 325 gr, too, but I'm betting it's a bit longer than the RN 320

 

[Red Devil]

I'd still do the dowel measurement. You'll likely be quite surprised at how much longer you'll be able to make them.

Yeah, norma also shows 3.228 for the Orxy 325 gr, too, but I'm betting it's a bit longer than the RN 320

Figure the RN bullets will be the long spec., and the semi-spits a little further off.

Will still jam test'em to set the seating depth, but powder capacity/load compression is what I'm interested in at this point.

Interesting piece on seating depth.

​

Red

 

[sgt_zim]

the further out you can set the bullets, the more powder you can stuff in.

Can't remember if it was Mule Deer or somebody else over there, but they set their COAL to where teh cartridge will just fit in the magazine. Couple of those guys use 65 gr of Big Game for the 286 gr bullets.

 

[Red Devil]

the further out you can set the bullets, the more powder you can stuff in.

Can't remember if it was Mule Deer or somebody else over there, but they set their COAL to where teh cartridge will just fit in the magazine. Couple of those guys use 65 gr of Big Game for the 286 gr bullets.

Yeah, another pt. for the RN.

Also depends on the throat.


Really lookin' forward to this LD.

MD thinks it's a boondoggle, as he is happy w/ the high velocity 250/286 gr. TSX/NP loads.

Think an SD of .341 and 320 gr. bonded RN at recommended impact velocity will be decisive.


Hunt mostly w/ the .270 Win/150 gr./Speer GS, or the .30-06 M1 rifle.

Both will take 'bout anything in N/A out to 400 yds.

This load is for thickets and alders, and for the bottom 2-3 rounds in the open, under the Hot-Cor loads.




Red

 

[Bob Nelson 35Whelen]

Thanks, good to know.

Hodgdon has a 3.150" COAL for a 300 gr., what I assume to be the HDY/DG, but that is not a true RN.

What does the Woodleigh book recommend RE: COAL for the 320 gr. RNSP?




Red

@Red Devil
Why do they recommend such a short coal for the 9.3. The Whelen is 3.34 so I thought the 9.3 would be the same or longer.
Bob

 

[Red Devil]

@Red Devil
Why do they recommend such a short coal for the 9.3. The Whelen is 3.34 so I thought the 9.3 would be the same or longer.
Bob

Have to take that up w/ Otto Bock.

8>)

Just measured the factory PPU 285 gr. load.

+/- 3.25".




Red

 

[Bob Nelson 35Whelen]

Have to take that up w/ Otto Bock.

8>)

Just measured the factory PPU 285 gr. load.

+/- 3.25".




Red

@Red Devil
Strange I would check the throat length and seat it as long as the mag allowed. It socks when you have a long throat and short mag
Bob

 

[Red Devil]

@Red Devil
Strange I would check the throat length and seat it as long as the mag allowed. It socks when you have a long throat and short mag
Bob

Yeah, will check/fit everything when the LD starts.

SAAMI COAL for the 9.3x62mm is 3.291" Max.

Pretty close.




Red

 

[Red Devil]

I'd still do the dowel measurement. You'll likely be quite surprised at how much longer you'll be able to make them.

Yeah, norma also shows 3.228 for the Orxy 325 gr, too, but I'm betting it's a bit longer than the RN 320

Just noticed that the 320 gr. Weldcore RN is the same length as the 286 gr. Weldcore PP, and the cannelure looks to be in the same place as well.

Should make the powder capacity a little easier to figure.

As for seating depth - generally make a dummy round, chamber for the initial set, black the ogive w/ a marker, and then run down the seating die until the leads stop removing the marker.

Then generally one full turn more.

Then crimp, mark, and save as a set-up plug.




Red

 

[andries 318 wr]

I'm happy with the 285/6gr Oryx/A-frames.
I would like to try the 325gr combo in my 9,3x74R Ruger No 1.
Any one done some testing and have data to share. The Rugers are known for the strength so would be nice to get the most out of them
Thanks

 

[sgt_zim]

I'm happy with the 285/6gr Oryx/A-frames.
I would like to try the 325gr combo in my 9,3x74R Ruger No 1.
Any one done some testing and have data to share. The Rugers are known for the strength so would be nice to get the most out of them
Thanks

The one thing I would suggest is don't try to make your 9.3 something it isn't. Most 9.3 bullets at around 2200-2400, sighted in at 150, won't require elevation adjustment on any deer sized animals or bigger out to ~200 yards.

The highest BC bullet made (that I know of) for 286 or heavier is Nosler Partition.

Even at 2500 fps, Partition still doesn't improve the arc in a meaningful way, 200+ yards is still the spot where you have to change elevation.

 

[Red Devil]

The one thing I would suggest is don't try to make your 9.3 something it isn't. Most 9.3 bullets at around 2200-2400, sighted in at 150, won't require elevation adjustment on any deer sized animals or bigger out to ~200 yards.

The highest BC bullet made (that I know of) for 286 or heavier is Nosler Partition.

Even at 2500 fps, Partition still doesn't improve the arc in a meaningful way, 200+ yards is still the spot where you have to change elevation.

Been rethinkin' the 320 gr. Weldcore RN load.

MD has a 2340 fps MV Weldcore PP load, a longer bullet, 61.5 gn. Big Game and CCI 200 primers.

That MV stretches the RN bullet performance out to 250 yds, w/ a 9.3" drop for +1.5"@100 zero.

Might be useful, as long as the 25 yd performance doesn't suffer.




GR

 

[sgt_zim]

The one thing about the PPSN is it does have a wider range for impact velocity (not that you'll get to the upper end), but 2340 fps sure looks like it's right in the middle of the wheelhouse.

I wonder what the ogive difference is between rn and pp

 

[112Savage]

So, I’ve been watching this thread for a while and I can’t help but ask… Why?? Ya’ll are loading to modern pressures so I don’t understand using the 320RNSN from a ballistics perspective it loses to other bullets very quickly and I don’t think you will see a terminal improvement either.

Bullet. MV 300yd FPS/ energy drop
320gr WWC 2375. 1775. 2240. 13.5”
250TTSX. 2601. 2080. 2403. 8.0”
286NP. 2515. 2045. 2657. 9.0
286A-F. 2508 1928. 2362. 10.2

From an energy perspective the TTSX catches the weld core by 150yds and the A-frame catches it at 60yds. Both will have a better trajectory and no one will argue their terminal effectiveness. So what exactly does the 320 weldcore do inside of 60 yds that can’t be accomplished with the other bullets?
These muzzle velocities are real data taken from my rifle using BigGame and CFE223 except for the 320 load and I used the maximum with BigGame for it.

 

[Red Devil]

So, I’ve been watching this thread for a while and I can’t help but ask… Why?? Ya’ll are loading to modern pressures so I don’t understand using the 320RNSN from a ballistics perspective it loses to other bullets very quickly and I don’t think you will see a terminal improvement either.

Bullet. MV 300yd FPS/ energy drop
320gr WWC 2375. 1775. 2240. 13.5”
250TTSX. 2601. 2080. 2403. 8.0”
286NP. 2515. 2045. 2657. 9.0
286A-F. 2508 1928. 2362. 10.2

From an energy perspective the TTSX catches the weld core by 150yds and the A-frame catches it at 60yds. Both will have a better trajectory and no one will argue their terminal effectiveness. So what exactly does the 320 weldcore do inside of 60 yds that can’t be accomplished with the other bullets?
These muzzle velocities are real data taken from my rifle using BigGame and CFE223 except for the 320 load and I used the maximum with BigGame for it.

This load is ideally a sub-100 yd "stopping" round, that will still work fine at 200-250, depending on the load.

It is more about applied energy than energy value alone.

The 320 gr. Weldcore RN has a very good reputation for that.

As stated, already have 285-6 gr. Oryx/A-Frames, for general/open hunting.

And they will work in the woods as well.

But in the woods/thickets/alders, or under a coupla rounds of 270 gr. Hot-Cor loads while hunting lighter game in bear/cat country, the 320 gr. Weldcore RN brings the authority of a slower/heavier/higher SD round nose bullet, that starts to work the problem at contact, retains its weight and shank, and will waste less energy as heat and over-penetration.

And it's a comparatively affordable bullet as well.

So, to me, a marginally better choice for the < 200 yd field.




Red

 

[Red Devil]

The one thing about the PPSN is it does have a wider range for impact velocity (not that you'll get to the upper end), but 2340 fps sure looks like it's right in the middle of the wheelhouse.

I wonder what the ogive difference is between rn and pp

For the same wt., judgin' by the cannelure location, would suspect the same.

Just more penetration into the powder space.

Which, again, would favor the LD prospects of the RN.




Red

 

[andries 318 wr]

I'm happy with the 285/6gr Oryx/A-frames.
I would like to try the 325gr combo in my 9,3x74R Ruger No 1.
Any one done some testing and have data to share. The Rugers are known for the strength so would be nice to get the most out of them
Thanks

What I forgot to mention I have a 9,3 x 62 and using the above 285/6 Oryx/A-Frames.
I also have a 74R and did not want to duplicate the 62mm load. Was thinking of a 250gr, but most my hunting is at short range. 50-150m. The reason for the Q about the 320gr