XTP real ballistic coefficients

[mickbr]

okay so, I know its not a catastrophic issue, but check Hornadies math here.

In 44 mag
240 grain XTP, .707 bullet lenth,sectional density .185 and BC, .204

in .452
300 grain XTP, 0.76 inches bullet length, sectional density .210 and BC, .180.

Meaning the 300 grain 45 colt bullet is longer, better sectional density, similar nose profile and hollowpoint, but ends up with noticeably worse BC.

I cant buy that. Id like to, the 240 XTP is one of my favorite bullets, but they must have gooned up one or the other.

Again, not a world threatening issue.

[JimT]

I have never paid much attention to paper ballistics. I have preferred - with hunting loads - to test them at various ranges on things that live and breathe.

Years ago I got notice from an ammo company that they had developed the finest and most efficient bullet for self defense. It was a one shot fight stopper! They sent me ammo so I shot things that were alive. It did not work. Punched through like a needle. Of course the critter was going to die, eventually.

I called them and asked them if they had ever tested it on something besides Jello. They said they hadn't but were thinking of taking it on a Mountain Lion hunt. I told them they were gonna get folks killed.

They were kind and took me off their mailing list. I never heard from them again.

I also noticed that they did not market their super efficient bullet. They must have tested it in the real world.

[Griff]

Although I know there's more to it... but the relative diameter to length is different. The .44 XTP is .607% of it's length, while the .452 is only .595%, and with similar ogives, the advantage goes to the slimmer bullet. I don't know what it is I don't know... so I'll just claim ignorance... if that theory is all wet.

[44shooter]

The 45 seems wider at the nose in proportion to its diameter than the 44 to me, thus a little less sleek. Also 44 bullets tend to be a longer in the nose than 45s, generally. A difference in .025 bc is pretty negligible even in high power rifle rounds. That said it is odd than even their 230 grain bullets for 45 auto are a little higher than the heavy 45

[mickbr]

Good points fellas, Maybe the 240xtp still reigns supreme .I might try and shoot some through the chrony at 100 yards.

[mickbr]

I called them and asked them if they had ever tested it on something besides Jello. They said they hadn't but were thinking of taking it on a Mountain Lion hunt. I told them they were gonna get folks killed.

Jim , Id say you did them a favor.

[piller]

While gelatin is helpful for some things, it just does not tell how the bullet reacts in the real world. Live targets, such as wild pigs, give a good idea of how well things work. We all know that. I have used XTP bullets. My experiences with them is that they work if not pushed too fast. I used the .44 Mag version in a sabot for an inline muzzleloader which is rated for 150 grains. The load was 120 grains Hodgdon Pyrodex RS. The bullet did not hold together as well as I hoped, but the pig didn't complain.