39 replies to this topic

[retiredbosn]

6mmbr.com is also a great site and will also show ya the .243/6mmrem is better ballistically out to 1000m then most rounds including 308

Gonna depend on the category, if you are looking at terminal ballistics on living criters about the size of a deer then the .243 starts giving up ground and at about 350 yds lacks the punch to be reliable on deer. The .243 suffers from poor sectional density and doesn't penetrate sufficiently, I've shot deer at 100 yds with a 95 grain round from a .243 and the bullet didn't even make it half way through the deer, granted it was a quartering shot.

[clayton86]

Iv read reports of some far shots on black bear with the round hand loads pushing Berger and federal pills droping bear DRT out to 430yds I think was the farthest report iv seen. I haven't looked up the ballistics for the .243/6mm in a while I know what mine will do out to 500yds and can make it happen I don't shooting anything bigger then a coyote with mine. I know wind drift and drop is alot less then 7.62/.308 rounds at 1000. If I had 1000yds of line of site I'd try to shoot mine that distance but 550 is max shot for me ad that's with my feet in the horse pasture to max it out best I can lol.

[retiredbosn]

I hear ya, my father-in-law swears by his 220 swift, I have seen him take deer at close to 300yds with it, would never attempt it. But I love talking ballistics, and can bore you to tears with the ballistics of shotgun shells for example each pellet of #5 shot hits with 2ftlb of kinetic energy at 40yds assuming a 1 1/4 ounce load over 3 1/4 drams of powder!!! Yeah I used to be a big gun nut, lol, mainly shotguns due to my severe addiction to bird hunting. I actually put myself into the hospital at the end of a 5 day pheasant hunt in ND, I have some back problems and just would not quit to my detriment, that's why I quit bird hunting

[clayton86]

I hear ya, my father-in-law swears by his 220 swift, I have seen him take deer at close to 300yds with it, would never attempt it. But I love talking ballistics, and can bore you to tears with the ballistics of shotgun shells for example #5 shot hits with 2ftlb of kinetic energy at 40yds assuming a 1 1/4 ounce load over 3 1/4 drams of powder!!! Yeah I used to be a big gun nut, lol

I am to an extent but not crazy with numbers I don't have that good of a memory to remember all kinds of loads I know what my .243 can do my 20ga and my m4 the army issued me my.17hmr is finicky always shoots tight but seems to change each season I need to raise or lower POA a few clicks on scope.

[Raider Nation Fisher]

I hear ya, my father-in-law swears by his 220 swift, I have seen him take deer at close to 300yds with it, would never attempt it. But I love talking ballistics, and can bore you to tears with the ballistics of shotgun shells for example each pellet of #5 shot hits with 2ftlb of kinetic energy at 40yds assuming a 1 1/4 ounce load over 3 1/4 drams of powder!!! Yeah I used to be a big gun nut, lol, mainly shotguns due to my severe addiction to bird hunting. I actually put myself into the hospital at the end of a 5 day pheasant hunt in ND, I have some back problems and just would not quit to my detriment, that's why I quit bird hunting

Just out of curiosity. I'm well aware that this round kills and destroys most every living thing it contacts or breezes by. What would the ballistic comparison to a 690 grain round from my 50bmg be compared to my .338 Lapua Mag.

I know its like comparing a nuke to a cruise missle, but I'm curious.

[retiredbosn]

What length barrel do you have on your bmg?? It matters, a gun with a 20inch barrel verses one with a 30 inch barrel will shoot almost 500 feet per second slower. Full metal jacketed round?

[Raider Nation Fisher]

30in. Barrel
Also they are full metal jacket.

[clayton86]

there are some awesome Ballistic calculator apps for most smart phones that are pretty spot on you can put in all the info and it does all the work I tested it on my .243 and my .17HMR. The .243 was always right what it said it would be the .17was off but mostly in the wind drift 5mph will blow them little 17gr bullets all over the place. I use Ballistic:FTE(Field Tactical Edition) because it has a lot of the military surplus rounds that my nephew shoots and I'v used it for my M4 to see if it was the same as whats set in the ACOG.

[retiredbosn]

Go to Hornady's website, on the left there is a ballistics calculator and you can get more info than what I'm able to post.

50 bmg ballistic coefficient .992 / bullet weight 690 / muzzle velocity 2900fps
.338 ballistic coefficient .67 / bullet weight 250 / muzzle velocity 2900fps

quick and dirty black print is the 50bmg red print .338 250yd zero

range velocity/energy trajectory
muzzle 2900/12884 -1.5
muzzle 2900/4668 -1.5
100yds 2895/1268 +2.5
100yds 2761/4230 +2.6
200yds 2713/11276 +2
200yds 2626/3827 +2.1
500yds 2477/9171 -29.1
500yds 244/2796 -31.9
The 50BMG has tons of kinetic energy, but then again you would expect that out of a round that can pierce armor plating, lol.

[backcast88]

270 WSM Browning X Bolt.