Heavy Bullets!

[Scot E]

Actually I just ran six different comparisons with imaginary bullets comparing 6.5 140gr BC .520 to .308 180gr starting with the same BC's Same velocity of 3000fps. I kept lowering the BC of the .308 all the way down to .420 and the heavier bullet still showed less wind drift (20mph wind) all the way down until I hit the .420 BC.

It takes either more force or the same force acting longer to move a heavier object vs the lighter object.

Weight is definitely part of the equation when it comes to wind drift and it seems at least after a few preliminary runs on the ballistic calculator to weight considerably more in the equation than does BC.

Curious, I just did the same thing and the drop and drift numbers were exactly the same regardless of weight. What program did you use?

Scot E.

 

[Scot E]

This is a case similar to one we discussed recently. In the case of the 30-06 using such a heavy bullet makes far less sense since you lack the case capacity to launch it at an MV capable of maximizing the higher BC of the heavier bullet.

Work your same numbers but speed it up 400fps and see how much better the heavy bullet performs.

Yes, I think we are all aware that velocity changes everything. The point though is that not everyone shoot cartridges that big and even every cartridge in between the 2 are going to have a different break even point so it needs to be tested.

Scot E.

 

[Scot E]

Go ahead and take the best bc 6mm, 100gr bullet and the best bc 338, 300gr bullet and shoot them at identical velocity's...say 2800fps and let us know what fly's better with less wind drift and higher retained velocity. I know what your thinking...they don't make a 6mm bullet with the same bc.(that I know of) So why, do you make such a stupid statement? I'll promise you that weight has more to do with flight than what you give it credit for. Time to put the ballistic programs down and do some real testing.

We would have to find a 6mm with the same BC as the 338 for that test to have any merit. I am not sure I understand what you think that would accomplish.

Scot E.

 

[WildRose]

Curious, I just did the same thing and the drop and drift numbers were exactly the same regardless of weight. What program did you use?

Scot E.

That's pretty much what I got until I got the BC down to 420 on the 180gr.

Using Hornady's online calculator.

 

[sp6x6]

Common Now,Thats his point ,They DONT EXIST

 

[WildRose]

Common Now,Thats his point ,They DONT EXIST

Well actually they do. Look at the RN's and flat points along with flat based cheaper soft points.

 

[Long Time Long Ranger]

Glad to hear that a .42 BC bullet now shoots the same as a .52 BC bullet. Certainly no need shooting those fragile VLD high BC bullets at game anymore when I can shoot a quality hunting bullet with a BC of .1 less and get the same results.

So now this discussion has got to the point BC's don't matter. If two bullets have the same BC but one is heavier you just add a factor of .1 to the heavier bullet into your Kestrel and should hit dead on. I got it now. That is not what 40+ years shooting every caliber to .375 has shown with my results.

If the BC is the same plug it into your kestrel and it will hit the same no matter the weight.

 

[WildRose]

Glad to hear that a .42 BC bullet now shoots the same as a .52 BC bullet. Certainly no need shooting those fragile VLD high BC bullets at game anymore when I can shoot a quality hunting bullet with a BC of .1 less and get the same results.

So now this discussion has got to the point BC's don't matter. If two bullets have the same BC but one is heavier you just add a factor of .1 to the heavier bullet into your Kestrel and should hit dead on. I got it now. That is not what 40+ years shooting every caliber to .375 has shown with my results.

If the BC is the same plug it into your kestrel and it will hit the same no matter the weight.

Don't yell at us, yell at the math.

Notice I made no mention of drop nor retained velocity. I simply addressed wind effect so no where did I state "they shoot the same".

 

[Korhil78]

Can you show me these lighter bullets that have a better BC than the heavier bullets?

 

[Long Time Long Ranger]

Wildrose, I am not yelling at you. I appreciate your discussion. Please continue to contribute.

Honestly, I am just trying to figure out what all you guys quoting me are trying to say. If two bullets have the same bc and are fired at the same velocity with the same conditions they will fly exactly the same no matter the weight or the BC is not correct on one of them. Are you guys trying to argue with that. Just plain and simple if anything I have said in here is not correct by your opinion state exactly what it is and I will look at it.

I am sitting here this week trying to work a million dollar investment real estate deal and watching the forum for stress relief. I know my mind is not entirely on this but if I said something that is not accurate point that exact statement out and I will look at it.

 

[WildRose]

Can you show me these lighter bullets that have a better BC than the heavier bullets?

Try these. Hornady 8th Edition.

.308 180gr RN-BC .241

.265 130gr Sirocco BC .571

.308 165g Interbond BC .447

.308 220 Semi Spitzer Nosler Partition BC .351

Run them all at 3,000fps and see what it does for wind drift.

 

[WildRose]

Try these. Hornady 8th Edition.

.308 180gr RN-BC .241

.265 130gr Sirocco BC .571

.308 165g Interbond BC .447

.308 220 Semi Spitzer Nosler Partition BC .351

Run them all at 3,000fps and see what it does for wind drift.

I get the Following.

A) 425"

B) 134"

C) 189"

D) 266"

This is right in line with what LTR is saying and what I'd have said before running the other numbers.

I guess somehow I just managed to stumble on to the exception to the rule with the first set I ran... .Hmm

 

[Scot E]

Try these. Hornady 8th Edition.

.308 180gr RN-BC .241

.265 130gr Sirocco BC .571

.308 165g Interbond BC .447

.308 220 Semi Spitzer Nosler Partition BC .351

Run them all at 3,000fps and see what it does for wind drift.

Ok, I must be confused. I ran all of those numbers and the drift fell exactly in line with the BC numbers. What are you trying to prove with these numbers?

Scot E.

 

[Korhil78]

I get the Following.

A) 425"

B) 134"

C) 189"

D) 266"

This is right in line with what LTR is saying and what I'd have said before running the other numbers.

I guess somehow I just managed to stumble on to the exception to the rule with the first set I ran... .Hmm

I guess I should have been more specific. Can one show me a same or better type bullet, let's say a boattail bullet, same caliber, where the lighter bullet has the same BC as the heavier bullet?