Anyone know of one better than .460? Looking to get some real range out of my 375hh. I know there are better rounds for distance, but I love the cartridge.

have you checked Barnes?

I don't know what the BC is for the 300 grain Sierra, but I know it is high. Lou

The 300 gr. Sierra is listed at .475. Only slightly higher than .460 but every little bit helps.

350 SMK is supposed to have a BC similar to the .338 300SMKs, so ~.770.

350 smk? I can't find that on their site, but that's exactly what I'm hoping to find

Sierra doesn't list it on there site. They make them specifically for Cheyenne Tactical I think.

I found them listed here if you look under pricing information.

http://www.viersco.com/

Rocky Mountain Bullets is supposed to have some big high BC bullets coming out soon also(BC of around 1).

This is assuming you want cup/core bullets. There are several outfits making high BC solids as well. Take a look around the "tactical" and long range sites where guys are shooting 375/408 cartridges.

Check the Nosler Accubonds. IIRC the 260 grain has a bc of .460.

LWD

The big SMK's are the way to go for long range energy if you have a cartridge that can get them up to speed!

I would not overestimate the B.C. Even at long distances, .440, .460 or .490 means VERY little difference in trajectory. I would rather focus on the bullet that gives you the smaller group

quote:

Originally posted by wildboar:
I would not overestimate the B.C. Even at long distances, .440, .460 or .490 means VERY little difference in trajectory. I would rather focus on the bullet that gives you the smaller group

That's 100% true, it actually means nothing. Too many shooters worry aobut BC when it really doesn't come into play until you are way past 300yds. Beyond 400yds, where it really matters, the bullet integrety comes into question. Will it expand, probably not. For the 375h&h, the 260grNAB would be a good choice for a game bullet out to 400yds. Farther than that, I think you need more vel. than you can get w/ the 375h&h.

Nosler just introduced a 300gr Accubond for the 375. Given the 260gr has a BC of .473, I'd expect good things from the 300-grainer; it should be damn near .500. I don't think they're shipping yet, but keep your eyes open.

Will the BC change with velocity? I have noticed two reloading manuals that don't agree on this.

Michael, I'd sure suggest you try the 300 gr Sierra first. By the time Sierra introduced it in the mid-70's, I had shot about everything else that was available - a lot. I, and most everybody else that tried it felt like the 300BT just made a whole new cartridge out of it.
Incredible difference in long range tradjectory.

Don't know what you've got for a rifle, but assume it's some kind of a sporter -standard chamber. My Sako, as well as Rem, Win, and Ruger all use a 12 twist, or at least used to. A buddy had a Browning though, that had a 14 twist. Loaded for it quite a bit too. Just my impression, but while it would stabilize the 300 BT, it seemed borderline to me.

Keep in mind that the powder capacity of the H+H is pretty modest by today's standards. Even the 300 gr intrudes into the case more than I'd like. If you'll be using the rifle as a repeater, mag length will govern OAL. I suspect today's extra long bullets will create more compromises in the old H+H case than they're worth. Be careful in trying to use the advances of the tactical community in a standard sporter.

A lot of the beauty of the 375 is it's easy and predictiable to load for. Mine shoots most any weight/nose combo with very little windage change between groups. Good luck with yours and try the Sierra 300s. Bet you'll like them.

Hmmm comparing a BC of .46 and .5 same weight bullet, velocity and 100yd zero the difference at 400 yds is .2" and at 500 yd .4". Heck dropping back to .4BC is still only 1" at 500yds. Just how far you planning on shooting?

I found a 1k yard range not too far from here, kinda wanted to give it a shot before I bought a rifle specifically for it. I'd need a tremendous bullet to pull it off with this cartridge, I know. My other choices are my m1a 308, or tikka 223. None of the three are great choices for this range, so I'll probably end up getting a 300 win mag, or maybe a 300/338 rum. Thanks for the help everyone.