230 gr Berger OTM Transonic

[rscott5028]

I located a spot on the ranch where I can shoot 2076 yds. ...unfortunately, 1k to almost 2k is wooded creek bottom. So, it's going to be a big leap to get there.

The biggest cartridge I have is 300 Win Mag and I currently have a .5 MOA load running the Berger 230gr OTM at 2460 fps. I'm pretty sure I can push it a good bit faster or more precise. I just never had a reason to try before now.

Nonetheless, it doesn't seem like much hope of remaining supersonic the whole distance. So, has anyone tested the 230 gr OTM for extreme distance including transonic?

Or, does anyone have suggestions for pushing a 300 Win Mag this far?

On the one hand, I'm not looking for an MOA X Ring cold bore knockout. But on the other hand, I don't see much point in having projectiles tumbling all over the countryside.

Is it a waste of time trying to walk it to within a few MOA with a good bullet/load in 300 Win Mag?

Or, do I need to bite the bullet right from the start and build a 338 Edge?

...or, a big 7mm and hope the Berger 195 turns out as many hope it will?

Since this would be a fairly specialized/limited task, I'd probably just rebarrel my Savage 12 F-Class.

Thanks!
-- richard

 

[Broz]

Richard, here is the data I have that may help some. First we easily push them to 2775 from a 28" Broghton chambered in 300 Win. with H-1000

2nd, We were sending some last week from a larger cased 300 with a MV of 2877 mv. We took this rifle to 1800 yards and they were easily kept on the rock we were shooting even with some wind. The rock was about 3 moa wide and if the wind was consistant I feel holding 1 moa with them was very doable.

Now if you are simply wanting to kill some rocks, steel or paper, I say go for it. If you intend to hunt at this distance, then I like your thinking of a 338.

Jeff

 

[rscott5028]

Thanks Jeff. Great info.

What altitude?

I'm at 456 ft ASL.

Not hunting ELR. ...looking to kick it up a notch.

Just paper/steel at this distance.

Thanks!
Richard

 

[Broz]

I think we were about 5500 ft for the 1800 shots. The velocities were at 4100 feet.

Jeff

 

[Broz]

I think you will be ok. I can tell you we have sent a lot of the 300gr Berger OTM's into the subsonic velocities and they do super. Sometimes so well I am afraid to talk about it.

Jeff

 

[rscott5028]

Sounds good for starters.

Now, I've gotta work on a load with H1000 and figure out how to get enough elevation.

Thanks!
Richard

 

[BigBboy25]

I've shot them out to 1,547 yards and they did well. I'm getting a MV of 2,807fps out of my 28" Hart and at my elevation they weren't transonic or anything but they shot well. I think Bryan Litz shot them at a mile with the 300 grain OTM and they did well.

 

[srlamy]

I have only shot the 215 grain berger hybrid out of my 300 wm. Its a 5r milspec 26 inch barrel. Using rws brass with H1000 74 grains. I didnt think the hybrid was supposed to be depth sensative, but working a load up has been a chore. I am looking to hit steel at 1 mile and Im getting 2875 from my oehler and 3.62 coal will give me 1 inch at 100 yards and stay ss past 1760( I am not happy with that group size). I shoot the berger 175 otm in my 5r in 308 and they drive tacks, under .5 moa. last week the 308 did a 3 shot 7 inch group at 1k. Are the 230's tangent or secant ogive. I am ready to try another projectile, I know this gun will shoot better.

 

[Eaglet]

I'm really getting nervous, I have the belief that 230 gr. bullet out of a 26" barrel
in a 300 Win Mag,
should be kept at 2750 fps MAX. Velocities higher that that are trouble invitations.
That's a big bullet my friends.

For the 300 RUM, the 230 gr. bullet would have it's MAX at about 2965 fps.

Some numbers are getting close to that with the 300 win. Mag.

Pretty scarry!!!!

 

[Broz]

I'm really getting nervous, I have the belief that 230 gr. bullet out of a 26" barrel
in a 300 Win Mag,
should be kept at 2750 fps MAX. Velocities higher that that are trouble invitations.
That's a big bullet my friends.

For the 300 RUM, the 230 gr. bullet would have it's MAX at about 2965 fps.

Some numbers are getting close to that with the 300 win. Mag.

Pretty scarry!!!!

You are correct Eaglet. At least from our testing. At 4100 feet of altitude with H-1000 we got to 2775 safely from a 28" Broughton 5C. Tested with an Oehler 35P . This barrel is a proven fast shooter with 210's too (2916 fps) . This was done in Lapua brass that has one of the most generous case volumes we have tested. Much more than RWS. We saw pressure a couple grains above this even in Lapua brass. So velocities above this from a 300 win and I feel one should be careful, or try the load in a different chronograph.

Jeff

 

[Eaglet]

Thanks for posting Broz, that's very good information.

Thanks again!

 

[Kiwi Greg]

I'm really getting nervous, I have the belief that 230 gr. bullet out of a 26" barrel
in a 300 Win Mag,
should be kept at 2750 fps MAX. Velocities higher that that are trouble invitations.
That's a big bullet my friends.

For the 300 RUM, the 230 gr. bullet would have it's MAX at about 2965 fps.

Some numbers are getting close to that with the 300 win. Mag.

Pretty scarry!!!!

I have been playing with my new 30-375R in a 26" Spss 700 Rem.

Initial testing is showing 29-2950fps with the 230otm over a 35P, looking forward to getting it back after barrel fluting & putting the pressure gear on it

Initial accuracy is looking good

 

[Broz]

Kiwi, sound like a hammer to me... Keep us posted.

Jeff gun)-------------------------------------------------------------------------------------------lightbulb

 

[Eaglet]

I have been playing with my new 30-375R in a 26" Spss 700 Rem.

Initial testing is showing 29-2950fps with the 230otm over a 35P, looking forward to getting it back after barrel fluting & putting the pressure gear on it

Initial accuracy is looking good

Yeah, that's some serious killing power. Do keep us posted. Sure is interesting!