I was looking through my reloading manuals last night with the idea for a wildcat running through my head. What I was thinking of is the .300 WSM necked up to 9.3. Does anyone have a balistics program that figures case capacities? I was thinking this might give 9.3X64 Bren. balistics in an easier to obtain case. I know it can be done with one of the belted cases but I want to stay with a beltless one.

Thank You

Well it looks like a good idea.

I modelled you wildcat as follows

Neck length - 0.344"
Shoulder angle - 35 deg
Shoulder diameter - 0.538"
Case length - 2.1"
Base to shoulder length - 1.756"
Case capacity - 79.8 gr of water

The 9.3X64 Brenneke has a case capacity 82 gr.

Ballistic data
Each cartridge is loaded to 62,000 psi max avg
Load data is with the same powder in each case.
106% compression for the wildcat
105% compression for the Brenneke
Bullet - 286 gr

Wildcat (300 - 9.3 WSM)
65.3 gr of powder
Muzzle velocity - 2590 fps

Brenneke
67 gr of powder
Muzzle velocity - 2614 fps

Pretty close.

Someone madea .358 WSM, and was getting close to 2700 fps with a 250g, so that sounds about right.

WyoJoe -

I've uploaded to our website a drawing comparing the two, plus capacity data.

www.gmdr.com/levern/93300wsm.bmp

do shoot straight,
greg

WyoJoe,
There are several good software programs on the market that provide for a cartridge design feature. The one I use is "Load from a Disc" and uses an updated data feature based on the old Powley slipstick. It gives you loading data on different brands of powder whereas the Powley only used IMR powders. So far, it has done everything I have needed or wanted.

Ol' John