Berger .277 EOL Extreme Heavy Hybrid 170 Grain.

[Buckammo]

The 180gr. bullets were an accident. They came out of the dies at an inconsistent 0.281" (supposed to be 7mm) and no matter how much pressure we held on the ram, they were springing back too much. I took the rejected bullets and Dave Corbin was kind enough to make me a bullet reducing die to bring them down to 0.2772-0.2775". Unfortunately, Bullet Bob at NWCP sold out a couple years ago.

My plans are to evaluate with what I have; then if things look promising I will purchase a complete RBBT die set from Corbin. If Berger decides to sell the longer bullet jackets, it would really help me out.

The reason for the fast twist is the longer 180gr. bullets, but I suspect it will do just fine with the 170gr. Bergers.
Thanks,
John

 

[Longtooth32]

The 180gr. bullets were an accident. They came out of the dies at an inconsistent 0.281" (supposed to be 7mm) and no matter how much pressure we held on the ram, they were springing back too much. I took the rejected bullets and Dave Corbin was kind enough to make me a bullet reducing die to bring them down to 0.2772-0.2775". Unfortunately, Bullet Bob at NWCP sold out a couple years ago.

My plans are to evaluate with what I have; then if things look promising I will purchase a complete RBBT die set from Corbin. If Berger decides to sell the longer bullet jackets, it would really help me out.

The reason for the fast twist is the longer 180gr. bullets, but I suspect it will do just fine with the 170gr. Bergers.
Thanks,
John

Looking forward to your results…

Good discussion here on the 270 heavies…

http://www.longrangehunting.com/forums/f17/270-300-win-mag-now-feasible-155307/

 

[Longtooth32]

The 180gr. bullets were an accident. They came out of the dies at an inconsistent 0.281" (supposed to be 7mm) and no matter how much pressure we held on the ram, they were springing back too much. I took the rejected bullets and Dave Corbin was kind enough to make me a bullet reducing die to bring them down to 0.2772-0.2775". Unfortunately, Bullet Bob at NWCP sold out a couple years ago.

My plans are to evaluate with what I have; then if things look promising I will purchase a complete RBBT die set from Corbin. If Berger decides to sell the longer bullet jackets, it would really help me out.

The reason for the fast twist is the longer 180gr. bullets, but I suspect it will do just fine with the 170gr. Bergers.
Thanks,
John

Looking forward to your results…

Good discussion here on the 270 heavies…

http://www.longrangehunting.com/forums/f17/270-300-win-mag-now-feasible-155307/

 

[LKB]

Hey all! Like a lot of guys I've been lurking in the shadows for a cpl of yrs now amazed at the vastness of knowledge here and admittingly putting a lot of that knowledge to use for my own applications with nothing to contribute. Then I stumbled across this thread AFTER having a 270WSM built last yr. I'm fairly new to reloading and even newer at the LR game so go easy if I mistype or miss something. I'm posting this in hopes it might help contribute something seeing as how the .277 with heavies is fairly new ground to all. So on to it....
Location: Southern Oklahoma 800 ft asl
Equipment: Custom build on Stiller midlength action with a 1:9 Bartlein finished at 26"

I had this rifle built specifically for the Matrix 165s when low and behold here comes the Berger 170s, like some of you my concern at 800 ft asl with a 1:9 was stabilization. Using Berger's load data and Retumbo I started out by finding my rifles max charge. All 3 shot groups were sub minute except one which was right at 1". Next I went to working on groups and seating depth. Long story short my accuracy node was just .7 over starting charge but thanks to the shorter bearing surface I was still running a chronied 2975 fps whereas I was 2900 with the matrix and 66.0 gr of Retumbo. So to wind this up the Berger's are stabilizing in MY 1:9 twist 270WSM at 800 ft asl.
Range Report:
Zero: 200 yards
Weather: 65-70 F with 8 o'clock wind 5 gusting to 10
I had solid hits to 1200 yards but to keep this as short as possible I'll give 3 "dope" distances. Using their advertised G1 b.c.
800 yards=15 minutes up
1000 yards= 21 minutes up
1200 yards= 29.5 minutes up
Not sure if this will help anyone or not but there ya have it! I'm sure I left out something lol. Thanks to everyone involved in this sport and God bless!

 

[The Hock]

I have a .277 barrel but it's a 1-10. My intent had been to build a .277-.338 Norma. Following this thread it seems a 28 Nosler would be a better parent case. Capacity is veery close to the 300 Winchester Mag buy smaller than the Norma so ballistics will be similar.

My question is what can I expect with the 165 Matrix? I've decided to go ahead but I'm curious if someone has experience with the slow twist, heavy bullets and large case.

 

[Big Jake Duke]

Hey all! Like a lot of guys I've been lurking in the shadows for a cpl of yrs now amazed at the vastness of knowledge here and admittingly putting a lot of that knowledge to use for my own applications with nothing to contribute. Then I stumbled across this thread AFTER having a 270WSM built last yr. I'm fairly new to reloading and even newer at the LR game so go easy if I mistype or miss something. I'm posting this in hopes it might help contribute something seeing as how the .277 with heavies is fairly new ground to all. So on to it....
Location: Southern Oklahoma 800 ft asl
Equipment: Custom build on Stiller midlength action with a 1:9 Bartlein finished at 26"

I had this rifle built specifically for the Matrix 165s when low and behold here comes the Berger 170s, like some of you my concern at 800 ft asl with a 1:9 was stabilization. Using Berger's load data and Retumbo I started out by finding my rifles max charge. All 3 shot groups were sub minute except one which was right at 1". Next I went to working on groups and seating depth. Long story short my accuracy node was just .7 over starting charge but thanks to the shorter bearing surface I was still running a chronied 2975 fps whereas I was 2900 with the matrix and 66.0 gr of Retumbo. So to wind this up the Berger's are stabilizing in MY 1:9 twist 270WSM at 800 ft asl.
Range Report:
Zero: 200 yards
Weather: 65-70 F with 8 o'clock wind 5 gusting to 10
I had solid hits to 1200 yards but to keep this as short as possible I'll give 3 "dope" distances. Using their advertised G1 b.c.
800 yards=15 minutes up
1000 yards= 21 minutes up
1200 yards= 29.5 minutes up
Not sure if this will help anyone or not but there ya have it! I'm sure I left out something lol. Thanks to everyone involved in this sport and God bless!

Sorry if i missed it, but what was your bullet jump for your best accuracy?

 

[Big Jake Duke]

Ive been testing these bullets for awhile and my results have been schitzophrenic. Some days i am in love with them and others leave me scratching my head.

So my question for this group is what bullet jump gave you the best accuracy?

And maybe the powder too.

Thanks

 

[LKB]

Sorry I'm just seeing your question, I believe I'm .002 from touch. I'd have to double check my notes.

 

[LKB]

I was mistaken, I'm at 20 thousands off.

 

[Calfarmer]

hey was wondering if anybody has tried for the heck of it to shoot these threw a 270 wby factory barrel with 10 twist? on bergers calculator if i can push them 3000fps or faster they have moderate stability? I'm at only 250 ft elevation so as i i raise that option they get even more stable.
so was wondering if anybody has gave it a try and if so and had luck what was your load?
thank you

 

[barefooter56]

hey was wondering if anybody has tried for the heck of it to shoot these threw a 270 wby factory barrel with 10 twist? on bergers calculator if i can push them 3000fps or faster they have moderate stability? I'm at only 250 ft elevation so as i i raise that option they get even more stable.
so was wondering if anybody has gave it a try and if so and had luck what was your load?
thank you

Calffarmer,
This will help you interpret your SG reading on our TWIST RATE CALCULATOR : Berger Bullets Twist Rate Recommendations by Eric Stecker & Bryan Litz | Berger Bullets
Altitude is the biggest help for lack of twist rate. If you have any more questions you can contact us here or at [email protected].
Take care,

 

[Big Jake Duke]

I have a .277 barrel but it's a 1-10. My intent had been to build a .277-.338 Norma. Following this thread it seems a 28 Nosler would be a better parent case. Capacity is veery close to the 300 Winchester Mag buy smaller than the Norma so ballistics will be similar.

My question is what can I expect with the 165 Matrix? I've decided to go ahead but I'm curious if someone has experience with the slow twist, heavy bullets and large case.

I've been very happy shooting my Matrix 165s out a 1-10 270 AI. Great accuracy at 2950fps. I used h4831 for that load.

 

[Reno1]

I've been very happy shooting my Matrix 165s out a 1-10 270 AI. Great accuracy at 2950fps. I used h4831 for that load.

At what altitude?

 

[Buska]

Mr. Beck,

I was looking at doing a build based on this bullet and want to do something like a 270 STW or a 270 RUM. It will be a fun little project, hopefully I can get some velocity behind those 170 grain fattys. I'll let you know how it goes but I'm excited about it. Will be a fun deer/elk set up for sure! Love your show by the way