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338 Sin

 
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  #1  
Old 01-16-2011, 07:58 PM
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338 Sin

I have been working on this project for a while now and it was designed to be a long range hunting round just like the 338 rum and 338 edge. The purpose was to get as close to 338 Rum performance and still work in a std length long action. I make a ton of barrels for Savage rifles and have been producing quite a few 338 edges. My customers ask me how to make a Savage a repeater with an edge and I have to tell them it would take a lot of more, lots of money and still limit the oal of the round. So I went to work designing the 338 Sin, what it is based off is the 300 rum/338 Rum case. The case is shorten to std 338 win mag length and then the case is blown out and changed to a 40 degree shoulder. I am with in 6grs of the 338 rum for capacity. I am awaiting my reamers to show up but my HS gauge came on friday so I thought I would share a little. This is designed to work with Savage/Howa/Vanguard/ect. all you need is a std magnum rifle and you can swap the barrel out and have a long range target/hunting rifle with out spending tons of money on custom mag box or stocks. Let me know what you think. I will post pics of the test rifle when the reamers show up. Thanks


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  #2  
Old 01-16-2011, 08:03 PM
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Re: 338 Sin

This might be a stupid question, given all that you have put into this, why not use a 338 Norma Mag case? Basiclly the numbers as you have now.
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  #3  
Old 01-16-2011, 08:10 PM
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Re: 338 Sin

there is more support for the Rum case and the Rum case uses the std mag bolt head and not the lapua bolt head
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Old 01-16-2011, 08:28 PM
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Re: 338 Sin

Dig it!! I was playing with a 338 Edge and a 338 Norma the other night in a Vanguard and a Savage and the Edge just did not look like it was a simple repeater situation without compromise. The Norma on the other hand was perfection and with the bullet seated in the right place but it will also need some mod to work, the Edge looked like the bullet was wearing a turtle neck it was seated so deep.

Will you be selling the reamer and gauge?
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  #5  
Old 01-16-2011, 08:36 PM
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Re: 338 Sin

I like the concept. I have been pondering the same problem. The closest to what you have designed is the 338/375 Ruger or the 338 Dakota but yours will have more velocity.

I am VERY interested in it. How do you go about forming the brass?
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  #6  
Old 01-16-2011, 08:52 PM
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Re: 338 Sin

Sinarms has built me two 338 Edge barrels and I couldn't be happier. Devin is great to work with.

I've been following this pretty closely over on Savageshooters.

He's going to make the dies as well. So, starting with a 300RUM, all you'd have to do is FL size it in the die. That should make the 40 degree shoulder, there may be a little to fireform in the case wall, but it shouldn't be much.

All that would be left is to trim to length and turn the neck if it's too thick.

I'm going to use 338 RUM brass in my 338 SIN.
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  #7  
Old 01-16-2011, 08:54 PM
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Re: 338 Sin

I will be offering die's cut from blanks, probably just the body so you can add what type of expander and seater you want. I will probably carry the gauges and maybe a reamer. I will mainly concentrate on offering barrels for people that want to install them. I might put together a few rifles here and there ready to go.

Forming the brass will be just like any ackley cartridge but I might mess around with making a hydro forming die and see how easy that works. I might offer brass ready to load but my time is already limited so I dont know how I would be able to offer that but who knows.
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