tallone Posted June 28, 2006 Report Share Posted June 28, 2006 I have a weatherby mark v in the 270 mag and I'm trying to find the ballastics chart that show the bullet drop. My gun is the "mountain" gun that has the shorter 24" barrel instead of the 26 that most of the weatherby mags are. I can find the charts for that size but not mine. How much of a difference do you think that makes? Quote Link to comment Share on other sites More sharing options...
AJ Posted June 28, 2006 Report Share Posted June 28, 2006 Re: How much different with a 24inch barrel Your velocity loss will be anywhere from 50-150 fps. I can give you closer numbers this afternoon when I get home. Quote Link to comment Share on other sites More sharing options...
tallone Posted June 28, 2006 Author Report Share Posted June 28, 2006 Re: How much different with a 24inch barrel Okay, thanks AJ. Will you be able to tell me how to figure the bullet drop in relation to the velocity on a given weight of bullet? Quote Link to comment Share on other sites More sharing options...
tallone Posted June 28, 2006 Author Report Share Posted June 28, 2006 Re: How much different with a 24inch barrel Hey Aj I finally got a hold of someone at Weatherby that knew and he said a 60fps difference and that wouldn't make a noticable difference in bullet drop so i can use the same ballistic chart as they have for the 26" barrel Thanks. Quote Link to comment Share on other sites More sharing options...
iron buck Posted June 28, 2006 Report Share Posted June 28, 2006 Re: How much different with a 24inch barrel There is a very interesting discussion over at 24 HR Campfire hunting forums regarding this issue. Here is the link: Velocity loss-Cutting barrels Read the posts by Mule Deer . He is John Barsness, a gun scribe of good rep. He puts a lot of insight into what is fact & what is fictiion on this topic. Quote Link to comment Share on other sites More sharing options...
tallone Posted June 28, 2006 Author Report Share Posted June 28, 2006 Re: How much different with a 24inch barrel That was an interesting thread, thanks. It looks like he agrees with what I heard from Weatherby which is not a noticable difference. from a 24 to a 26. I'm going on a Elk hunt (my first) and wanted to know the ranges of my gun or at least where they should be, while I pratice shooting farther. Quote Link to comment Share on other sites More sharing options...
too_pointer Posted June 28, 2006 Report Share Posted June 28, 2006 Re: How much different with a 24inch barrel WOW, my eyeballs are sore & tired now LOL did I learn much, I doubt it !!!!! If I ever feel the need to shoot way out there, then yes, bring it on. too_ Quote Link to comment Share on other sites More sharing options...
AJ Posted June 29, 2006 Report Share Posted June 29, 2006 Re: How much different with a 24inch barrel Will you notice a difference in the field? Nope, but than again you will not really see a difference between a 308 Win and a 300 Win Mag either. At normal hunting distances, a couple hundred fps means little except recoil for the shooter. The thread makes the statement that its not much different. That blanket statement is not true in every case. As the powder capacity to bore size ratio goes up, the slower burning powders that are used to make the higher velocity are not as efficient when the expansion chamber is too short. You have to understand internal ballistics more than just having a hacksaw and a long barrel. Say if you use a medium burn rate powder to get to a certain speed with a xx" barrel. If you reduce the barrel length a couple few inches, you can use a slightly faster burning powder and still be as efficient. Not necessarily the same speed, but similar velocity in xx" or XX+2" barrel. If you used the slowest burning powder, there is a bigger difference in the speeds. You could probably find that the percentage of velocity loss is similar between the different cartridges, but the faster cartridges will have a larger number but the same percentage. Quote Link to comment Share on other sites More sharing options...
tallone Posted June 29, 2006 Author Report Share Posted June 29, 2006 Re: How much different with a 24inch barrel Mine came from the factory this way and with my muzzlebrake kick is not an issue but I know I will never have another one on any gun I own, the noise my gun makes is literally unbearable. I will take a kick over that anyday. I only use the weatherby rounds so the powder burn should be fine for this gun. I was just needing the ballistics for it. Myself I couldn't put a hacksaw to any of my guns but thats just me. Quote Link to comment Share on other sites More sharing options...
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