07-25-2016, 11:40 AM
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#9
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Senior Member
Join Date: Aug 2014
Location: Behind the Orange Curtain
Posts: 3,611
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Hi, Snowflake.
If you're just poking holes in paper for the fun of it, there's no reason to not use cheap ammo. Use the high-dollar stuff for carrying and for occasional practice.
Chuck,
Let me offer up an alternative perspective. The energy derived from a particular load is a function of the bullet mass AND its velocity (mass times velocity squared). I'm sure you know, but I'll say it for others who might be reading, when a manufacturer uses a heavier projectile, they must decrease the amount of gunpowder. If they use the same amount of powder, the internal pressures become too great and bad things happen.
Hornady's web page shows their 9mm 147 gr. XTP as producing 310 foot pounds of energy at the muzzle. Their 115 gr. XTP produces 341 foot pounds at the muzzle. That's 10% more energy from the 115 gr. round!
How does this apply to Snowflake's question? I don't know. How does this apply to breaking in a gun? I don't know that one, either.
Have a happy Monday, kids.
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