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# 30-30 rifle?

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Hi, I am doing this physics problem that deals with a 30-30 rifle and a bullet. It has to deal with conservation of momentum. I''m not really sure, but what does 30-30 mean? It''s in the problem statement, and I just want to make sure whether it is or is not relevant to the problem. I think it has something do with caliber, but I''m not really sure. So what is a 30-30 rifle? Thanks!

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Um isnt 30.30 a common size of sniper rifle?

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I dunno, all I can find on the Internet is things on a 30-30 winchester rifle.

EDIT: They don't say what 30-30 means though...

Edited by - Viscous-Flow on November 11, 2001 5:42:45 PM

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I figured it out. I found the info on this webpage

Quoted from that webpage:
The rifle''s "30-30" refers to the type of cartridge (which is the assembly of a lead bullet, its brass case, and the black powder inside) for which the rifle was chambered (the same type of rifle can be built to accept different sizes of cartridges). The 30-30 cartridge uses a .30 caliber bullet (that is, the diameter of the bullet itself is 0.30 inch), and 30 grains of black powder (there are 7,000 grains to a pound--these pre-metric units of weight are so quaint).

I guess that means it is of no importance for the problem.

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Try this site 30-30 Centerfire Rifle Ammunition. They don''t give you nice little equations, but they give you enough to get a rough equation making a few assumptions.

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Okay,

This seems to be a homework question, which normally I don''t approve for this forum. But the question is not technical in nature so the question is borderline acceptable. The only remaining issue is that the question itself doesn''t relate to math or physics.

Graham Rhodes
Senior Scientist
Applied Research Associates, Inc.

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