27 Nosler

[Northkill]

There is a good possibility that the new 150 will still be stabilized by an 8 twist

Is this "new" something other than the existing BD2? The BD2 from last year works well in my 8 twist 7 AM, but that's launching at nigh 3,700 fps...

 

[M500.]

There is a good possibility that the new 150 will still be stabilized by an 8 twist

Could you post a picture of the 140 .277? Not seeing one on your store. Thanks

 

[codyadams]

Could you post a picture of the 140 .277? Not seeing one on your store. Thanks

Not on their site, but this is what they look like. Seated .020" off in a .270 Sherman. Sharpie shows bearing surface in the case neck.

 

[Northkill]

Here's a one of the 140 SBD2 alongside a 156 Hammer Hunter (sorry it's the only one I have). The recovered bullet is a 7mm 150 BD2 from gel.

 

[M500.]

Thanks guys. Nice looking bullet. How would you compare hydrostatic shock to a cup/ core bullet?

 

[akmtnhnt]

I really like the way the rounds look in your photo. You have excellent accuracy to close to 1000 yds. I like the longer neck as well. You got me thinking about making one. I've got a long action ARC action I could use. Whose reamer did you use and could you send me the throat dimensions? We were discussing yesterday designing a very high BC 150 gr copper Bulldozer hunting/target bullet that will run in a 1:7 twist barrel.

Please do. I'm having a barrel throated to seat the 140s longer right now. Maybe, I should wait....

 

[nralifer]

Please do. I'm having a barrel throated to seat the 140s longer right now. Limited to 2.950 COAL though, but if the 150 is going to stabilize in 1:7 just like the 140 needs, I'm guessing it'll be a little stubbier?

The 140 needs an 8 twist. We will try and make the 150 stabilize in a 1:7.5, but if you are building a 1:7 gun, by all means use that twist. We are trying to make the new 150 stable in factory rifles with 1:7.5 barrels. I don't think your round will be any stubbier since the length of the 150 we anticipate to be <0.085" longer than the 140. Have to see how the computer modeling turns out.

 

[akmtnhnt]

The 140 needs an 8 twist. We will try and make the 150 stabilize in a 1:7.5, but if you are building a 1:7 gun, by all means use that twist. We are trying to make the new 150 stable in factory rifles with 1:7.5 barrels. I don't think your round will be any stubbier since the length of the 150 we anticipate to be <0.085" longer than the 140. Have to see how the computer modeling turns out.

I thought the 140 was 7 twist. Guess not. .085 longer, I'm gonna wait and see what you come up with so I don't throat this too short these bullets are LONG and eat a lot of case in saami chambers. I did just buy a bunch of 140s though.

 

[nralifer]

Really interested to hear about this bullet. Looking at building something .277 on a 7 twist and this bullet might be the ticket.

I agree. The 1:7twist will definitely work for the new bullet.

 

[The Hock]

With a chamber throated for Berger 170s seated out on a WSM I'd think I'd be good for the Hammer bullets. That's what I'll have. But I'd like to try the Hammers if I'm not too far away.

 

[nralifer]

I thought the 140 was 7 twist. Guess not. .085 longer, I'm gonna wait and see what you come up with so I don't throat this too short these bullets are LONG and eat a lot of case in saami chambers. I did just buy a bunch of 140s though.

despite the SAAMI throat you still will be ahead of the competition because the bullet is very efficient (highest BC/weight).

 

[The Hock]

Whoever is chambering your barrel compare their reamer drawing to SAAMI. most gunsmiths I've encountered chamber for short actions not medium or long so they use a short throat.

 

[akmtnhnt]

Whoever is chambering your barrel compare their reamer drawing to SAAMI. most gunsmiths I've encountered chamber for short actions not medium or long so they use a short throat.

Ya, I always send a dummy round for any barrel I'm having made.

 

[akmtnhnt]

despite the SAAMI throat you still will be ahead of the competition because the bullet is very efficient (highest BC/weight).

Ya, but if you're spending money on custom, it might as well be custom.