Recent content by ImBillT
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7mm Backcountry anyone?
Cases springing back is exactly why you would reduce the sizing die dimensions. You don’t get any plastic deformation until you go past the elastic region. An over simplification would be to say that if you had a bar that could be bent 1” and fully return, but you needed a .5” bend in the bar...- ImBillT
- Post #36
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
I don’t know why we can’t as soon as someone offers brass. My guess is that manufacturers will be reluctant to offer brass for other cartridges based on that giving the loader the ability to raise pressures regardless of whether or not the rifle manufacturer has given their stamp of approval. I...- ImBillT
- Post #34
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
While not exciting, st lesst that doesn’t require extreme equipment. If a single sizing doesn’t size it down all the way, why not reduce sizing due dimensions slightly?- ImBillT
- Post #33
- Forum: Ammunition and Reloading
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NM Unit 27 shameless information request
^^^^^^ Bump because I added new information to the post after you liked it, and I didn’t want you to miss it. -
NM Unit 27 shameless information request
Call the local GW, and county police department. They will be able to help with what roads you can use. Anytime you’re in NM you should use CarryMap. The roads and ownership information is better than OnX(and it’s free). OnX is easier to view and use offline, so it’s worth having, but... -
Unit 40 New Mexico
Congrats on the buck! What other units do you like to apply for? ;) -
7mm Backcountry anyone?
Last I heard Federal said something along the lines “yes if you follow our method”, but I’m not aware of them publishing any methods. So unless someone has new information, then would lean toward saying that it is not currently reloadable.- ImBillT
- Post #25
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
My guess is that the 7BC is closer to 60-63gr. IIRC I’m shooting 61.5 in my 280AI. I’d have to look. The 7BC would likely use a similar powder charge of a slightly faster powder. I was originally thinking the 7mag tended to use more powder than most load data suggests. It isn’t as much larger...- ImBillT
- Post #24
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
Now there’s a report that matters!- ImBillT
- Post #20
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
More slightly off physics. Momentum is always conserved. None is lost to heat or elastic deformation or anything else. The rifle started at 0 momentum, and in order for the total to remain at 0, the rifle must move rearward at the same MV(mass X velocity) that the bullet and propellant gases...- ImBillT
- Post #19
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
That’s poor physics. You didn’t account for the mass and velocity of the powder. I don’t know what velocity they use for burned powder in recoil calculators, but it exits the muzzle at a much higher velocity than the bullet does, and thus 1gr of powder increases recoil more than 1gr of bullet...- ImBillT
- Post #15
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
It requires no special powder.- ImBillT
- Post #14
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
I feel like I used an online calculator and came to this same conclusion earlier, but I just ran one, and the 7BC was right there with the 7PRC, but I was pushing the bullet faster in the 7BC. I may have used an excessively high velocity just now, which would drop the recoil a little.- ImBillT
- Post #13
- Forum: Ammunition and Reloading
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7mm Backcountry anyone?
Run it through a recoil calculator. A 7mmBC pushing a 175gr at 3000fps is very similar in recoil to a 7PRC pushing a 175 at 2800fps. The reason it isn’t a direct correlation to bullet mass and velocity is that powder mass also contributes to recoil, and once the bullet unplugs the barrel...- ImBillT
- Post #12
- Forum: Ammunition and Reloading
