Help with bullet pens please

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Vermontpens73

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So I've made a handful of .308 bullet pens and found this size casing amongst a bag of them. My question(s) is, do they make extra long or longer cross style refills, and is there another way to make this new bullet pen without having to bury the transmission, given the two side by side, looks like I would have to. Thanks for any help
 

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Hmmm. I'm wondering if that might be a .30-06 brass? The .270 Winchester is even longer than the .30-06, but it looks like both of the cases in your picture have the same neck diameter. As Curly commented, what is stamped in the end? - Dave
 
egnald said:
Hmmm. I'm wondering if that might be a .30-06 brass? The .270 Winchester is even longer than the .30-06, but it looks like both of the cases in your picture have the same neck diameter. As Curly commented, what is stamped in the end? - Dave
Click to expand...
The brass is .308
 
Looks like you are using a 30 cal bullet for the nib end. If so, I set the nib further into the casing and press the transmission in further also.
Here's what my 300 Win Mags look like.
IMG_3326.jpeg
 
Vermontpens73 said:
The brass is .308
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Ok, then it is likely a .300 Winchester Magnum casing. It was based on the .375 Holland & Holland Magnum, but it was necked down to accept a .308 caliber bullet. The case is 2.62" inches long vs the .308 Winchester at 2.02" inches (0.060" inches longer). There are also some newer .300 Magnum cartridges like the .300 Weatherby and .300 Remington which are both 2.825" inches long and the .30-378 Weatherby which is 2.913" inches long. Perhaps measuring the case length might help identify which one it is. - Dave
 
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