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Post by greenerjim on Mar 23, 2016 14:47:37 GMT
So I designed a wildcat a while ago but shelved it. That is until I saw the 50 AB  I'll keep it a little vague but suffice to say it'll be big and have the potential to be deer legal whilst subsonic. The progress will be slower than C18rch's due mainly to deployments but I thought I'd do a step by step. The cartridge will headspace on the mouth and from guesstimates/talking to C18rch I should have enough brass to do this. My parent cases arrived today and I took them straight to my mate to machine down to 51mm. Once that's done I can work out if this is even feasible  These are the cases pre-trimming:  |
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Post by sako75varminter on Mar 23, 2016 18:41:09 GMT
Ohhh!!...this looks very interesting! ...sounds like a great hog buster to me! |
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Post by greenerjim on Mar 23, 2016 18:53:12 GMT
IF I have enough mouth to headspace on and IF I can fit the intended diameter bullet in it'll certainly slap them down....IF my FEO lets me  |
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Post by c18rch on Mar 23, 2016 19:58:38 GMT
I dunno about progress being slower. Mine has stalled until I get the reamer.  |
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Post by greenerjim on Mar 23, 2016 20:13:42 GMT
Where you order from?
Mine's biggest hurdle is getting it on my chit. After that it's just money and I don't mind sacrificing other niceties
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Post by greenerjim on Mar 23, 2016 20:38:29 GMT
The is the drawing.  I am expecting the external case mouth diameter to be larger as QuickDesign predicted the diameter shown based on original case mouth wall thickness. We shall see next week. |
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Post by c18rch on Mar 24, 2016 9:45:21 GMT
Where you order from? Mine's biggest hurdle is getting it on my chit. After that it's just money and I don't mind sacrificing other niceties PTG but they keep either losing the order or sending it back for amendments to the drawing. |
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Post by greenerjim on Mar 24, 2016 10:57:28 GMT
Well hopefully it won't be long now. It's frustrating as its a part you'll likely only use once!
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Post by greenerjim on Mar 31, 2016 19:58:48 GMT
Cases....  |
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Post by greenerjim on Apr 1, 2016 15:10:29 GMT
So, I've hit a problem. Case mouth wall thickness is 0.1mm which is nowhere near enough to headspace on I don't think.
Now this wildcat is designed to work in something roughly approximating a WSM action so I guess the next step is to shorten it down a little more to work in a WSSM action and hope that gives enough brass to headspace on.
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Post by c18rch on Apr 1, 2016 21:41:34 GMT
Yeah, that's a bit too thin. Mine are 0.014" or 0.37mm.
You can headspace off the extractor depending on the rifle, but it's not advisable. That's partly why I went 300 ultra mag. I can cut it short to give me the brass thickness and still have a reasonable sized case.
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Post by greenerjim on Apr 1, 2016 22:31:21 GMT
Well unfortunately I'm nipping away next week with work but when I'm back I can trim one of the cases down till I get to where I'm happy with headspace area.
I can then work with that length to see what it'll do.
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Post by greenerjim on Apr 2, 2016 14:14:53 GMT
Shortened one of the cases down (crudely) and I'm getting around 0.3mm wall thickness at 41mm case length. When I get back from deployment I think I'll take the cases down 1mm at a time on a lathe till I'm at 0.4mm wall thickness. Measurements are a little rough since I'm pre-occupied but this wildcat looks feasible once again |
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