9mm

Bucksnort1 · April 25, 2015, 02:40 PM

I have a 100 grain, plated, hollow base, round nose bullet. I also have a 100 grain, plated, flat bottom, round nose bullet. How can these two weigh the same?

higgite · April 25, 2015, 03:03 PM

Is this a trick question?

Clark · April 25, 2015, 03:26 PM

Are both bullets the same length and shoulder shape?

TXAZ · April 25, 2015, 03:36 PM

Different dimensions, different average densities?

skizzums · April 25, 2015, 05:50 PM

because they have the same amount of mass?

I have 100gr long .308 rifle bullets and 100gr short 9mm bullets and 100gr long .38 bullets, all of different shapes and sizes. they make em like that.....

Nick_C_S · April 25, 2015, 06:38 PM

Usually, hollow-base bullets are slightly longer than their flat-base counter-parts.

snakeye · April 25, 2015, 08:49 PM

StrutStopper · April 25, 2015, 10:01 PM

I have a pound of feathers and a pound of lead. How can they weigh the same?

axismatt · April 25, 2015, 11:01 PM

Okay y'all.. take it easy. He didn't provide some important info (dimensions primarily) so let's see if he has a legit response once he thinks about his question. If he's new, it might not be so obvious.

Brotherbadger · April 26, 2015, 02:04 AM

Quote:

because they have the same amount of mass?

Winner.

Bucksnort1 · April 26, 2015, 07:26 PM

Axismatt, not to worry about the responses. If someone wants to have a little fun, that's ok with me but, Skizzums is correct in his response. Here's the deal. I'm not a newbie re-loader.

These bullets are not mine; they belong to a fellow re-loader. I was at his loading bench, a few days ago when he showed me the bullets. We did not measure the length, which will be done tomorrow morning. I will post the results but from me handling the bullets, they look identical. If they are the same, how do we explain the same weight? Yeah, yeah, I know, they have the same mass. These are Berry's Bullets. Nick C S is probably right. There is a length difference. We'll find out tomorrow morning.

snuffy · April 27, 2015, 10:00 AM

The way I understand it, making a round nose bullet with a hollow base moves the mass forward. Sort of like a dart, nose heavy is more stable.

Another reward is it also makes the full caliber section, or AKA the driving band, longer for more barrel contact. That is as long as the nose shape is the same. Longer driving band area, more surface for the rifling to grab, more potential accuracy.

Since the bullet is a tad longer, you may need to seat it deeper to arrive at the same OAL. This shouldn't make a difference as for the powder charge as the hollow base makes for the same volume as a flat base bullet seated shallower.

Bucksnort1 · April 27, 2015, 02:10 PM

Strutstopper, remember, feathers are lighter.

Bucksnort1 · April 27, 2015, 02:13 PM

Here is the result of the measurement of the two bullets. Nick CS is correct, the bullets are different lengths. The flat bottom bullet is .449 and the hollow base is .470.

Sorry I bothered all of you with this.

snuffy · April 27, 2015, 03:55 PM

Quote:

Here is the result of the measurement of the two bullets. Nick CS is correct, the bullets are different lengths. The flat bottom bullet is .449 and the hollow base is .470.

Sorry I bothered all of you with this.

So my splaination didn't qualify for an atta boy!? Why Do I bother!

gwpercle · April 27, 2015, 04:11 PM

Atta boy snuffy , most excellent esplaination to it!

I was going to say they lied, one was heavier than the other....
Hey did anybody weigh them two bullets???

higgite · April 27, 2015, 05:28 PM

Attaboy, snuffy! Great comparison of darts and bullets, but not an answer to the original question, which was how can two things that weigh the same, weigh the same?

Bucksnort1 · April 28, 2015, 09:45 AM

Attaboy Higgite!

April 25, 2015, 02:40 PM	#1
Bucksnort1 Senior Member Join Date: July 8, 2013 Location: Littleton, Colorado Posts: 1,121	9mm I have a 100 grain, plated, hollow base, round nose bullet. I also have a 100 grain, plated, flat bottom, round nose bullet. How can these two weigh the same?

April 25, 2015, 03:26 PM	#3
Clark Senior Member Join Date: December 4, 1999 Location: WA, the ever blue state Posts: 4,678	Are both bullets the same length and shoulder shape? __________________ The word 'forum" does not mean "not criticizing books." "Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist. Are we a nation of competing ideas, or a nation of forced conformity of thought?

April 25, 2015, 03:36 PM	#4
TXAZ Senior Member Join Date: September 5, 2010 Location: McMurdo Sound Texas Posts: 4,322	Different dimensions, different average densities? __________________ Cave illos in guns et backhoes

April 25, 2015, 05:50 PM	#5
skizzums Senior Member Join Date: July 1, 2013 Location: Douglasville, Ga Posts: 4,615	because they have the same amount of mass? I have 100gr long .308 rifle bullets and 100gr short 9mm bullets and 100gr long .38 bullets, all of different shapes and sizes. they make em like that..... __________________ My head is bloody, but unbowed

April 25, 2015, 06:38 PM	#6
Nick_C_S Senior Member Join Date: March 21, 2013 Location: Idaho Posts: 5,523	Usually, hollow-base bullets are slightly longer than their flat-base counter-parts. __________________ Gun control laws benefit only criminals and politicians - but then, I repeat myself. Life Member, National Rifle Association

April 25, 2015, 03:03 PM	#2
higgite Senior Member Join Date: October 21, 2010 Posts: 1,025	Is this a trick question?

April 25, 2015, 08:49 PM	#7
snakeye Senior Member Join Date: July 5, 2013 Location: Arlington, TX Posts: 127

April 25, 2015, 10:01 PM	#8
StrutStopper Member Join Date: January 21, 2015 Posts: 51	I have a pound of feathers and a pound of lead. How can they weigh the same?

April 25, 2015, 11:01 PM	#9
axismatt Junior member Join Date: January 1, 2015 Posts: 141	Okay y'all.. take it easy. He didn't provide some important info (dimensions primarily) so let's see if he has a legit response once he thinks about his question. If he's new, it might not be so obvious.

April 26, 2015, 07:26 PM	#11
Bucksnort1 Senior Member Join Date: July 8, 2013 Location: Littleton, Colorado Posts: 1,121	9mm Axismatt, not to worry about the responses. If someone wants to have a little fun, that's ok with me but, Skizzums is correct in his response. Here's the deal. I'm not a newbie re-loader. These bullets are not mine; they belong to a fellow re-loader. I was at his loading bench, a few days ago when he showed me the bullets. We did not measure the length, which will be done tomorrow morning. I will post the results but from me handling the bullets, they look identical. If they are the same, how do we explain the same weight? Yeah, yeah, I know, they have the same mass. These are Berry's Bullets. Nick C S is probably right. There is a length difference. We'll find out tomorrow morning.

April 27, 2015, 10:00 AM	#12
snuffy Senior Member Join Date: May 20, 2001 Location: Oshkosh wi. Posts: 3,055	The way I understand it, making a round nose bullet with a hollow base moves the mass forward. Sort of like a dart, nose heavy is more stable. Another reward is it also makes the full caliber section, or AKA the driving band, longer for more barrel contact. That is as long as the nose shape is the same. Longer driving band area, more surface for the rifling to grab, more potential accuracy. Since the bullet is a tad longer, you may need to seat it deeper to arrive at the same OAL. This shouldn't make a difference as for the powder charge as the hollow base makes for the same volume as a flat base bullet seated shallower. __________________ The more people I meet, the more I love my dog They're going to get their butts kicked over there this election. How come people can't spell and use words correctly?

April 27, 2015, 02:10 PM	#13
Bucksnort1 Senior Member Join Date: July 8, 2013 Location: Littleton, Colorado Posts: 1,121	Strutstopper, remember, feathers are lighter.

April 27, 2015, 02:13 PM	#14
Bucksnort1 Senior Member Join Date: July 8, 2013 Location: Littleton, Colorado Posts: 1,121	Here is the result of the measurement of the two bullets. Nick CS is correct, the bullets are different lengths. The flat bottom bullet is .449 and the hollow base is .470. Sorry I bothered all of you with this.

April 27, 2015, 04:11 PM	#16
gwpercle Senior Member Join Date: November 30, 2012 Location: Baton Rouge, Louisiana Posts: 1,752	Atta boy snuffy , most excellent esplaination to it! I was going to say they lied, one was heavier than the other.... Hey did anybody weigh them two bullets???

April 27, 2015, 05:28 PM	#17
higgite Senior Member Join Date: October 21, 2010 Posts: 1,025	Attaboy, snuffy! Great comparison of darts and bullets, but not an answer to the original question, which was how can two things that weigh the same, weigh the same?

April 28, 2015, 09:45 AM	#18
Bucksnort1 Senior Member Join Date: July 8, 2013 Location: Littleton, Colorado Posts: 1,121	Attaboy Higgite!