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newly released BERGER 184 Hybrid (.284)... preliminary load data and results compared to 180 Hybrid

For what its worth I have shot a little over 500 of the 184's thru a new barrel and my reamer with a .220 freebore. I am not into the donut and I am no closer to the donut than with the 180 hybrids. I think this works because the ogive is different and has a longer taper on the 184.

My 184's mic a little smaller in dia. than the 180's also. .2839 in the middle of the bearing surface and .284 at the pressure ring on the 184 VS .2841 in the middle of the bearing surface and .2842 at the pressure ring on the 180. My load and chrono data has been very close to one another with both bullets. YMMV
GONZOS: excellent info.. thank you.
How is your accuracy with your 0.220 Freebore ... compared to the 180’s?? And what velocity are you running on the 184’s?
 
My accuracy has been outstanding with the .220 freebore in both bullets. For the 184's I did a seating depth test and .005 off shot the best with .030 off the second best. I'm running 51.1 of H4350 and getting 2820 fps. out of a 32" barrel and no pressure signs.
No question on the accuracy of your rig.
Nice shooting in WY!
CW
 
KEEP THE RESULTS COMING. REALLY APPRECIATE YOUR POSTS. GETTING READY TO DO A COUPLE MORE BARRELS. MINE ARE ALL 8.5 TWIST. HAVE HAD VERY GOOD SUCCESS WITH THEM. LOOKING FORWARD TO TRYING THE 184'S. THANKS AGAIN FOR THE WORK-UPS.
6_5_284: have you got the 184’s through the new barrel yet? Any interesting results?
 
Have there been any efforts at load development with IMR 7828ssc or Hodgdon H1000 - especially for 7 SAUM?
 
Have there been any efforts at load development with IMR 7828ssc or Hodgdon H1000 - especially for 7 SAUM?

Forget IMR 7828ssc, no one in their right mind would take that powder to a big match. Unless you know how to adjust your load based on weather conditions. It will shoot great one day, and then like crap on the following. As for H1000, it may shoot well, but most use a bit faster powder.
 
Forget IMR 7828ssc, no one in their right mind would take that powder to a big match. Unless you know how to adjust your load based on weather conditions. It will shoot great one day, and then like crap on the following. As for H1000, it may shoot well, but most use a bit faster powder.


The same situation that I get with the RS70.
One day with 57.2 I get 880 ms with 23º and two weeks later with 30º I get 905 ms ...
 
The same situation that I get with the RS70.
One day with 57.2 I get 880 ms with 23º and two weeks later with 30º I get 905 ms ...



That same situation of temperatures and load, has been given to me. With a speed in 30º of 915 m / s. That gunpowder is crazy. Ruin my competition by leaving the ammunition in the sun, in the last entry.

And I have annoyed 30 brass
 
Hello,

After reading this post and following for a few months I decided to build a 7mm .284 WIN rifle. As right now I sent 2 dummy rounds (3.305 COAL/2.256 OAL) for a reamer to be manufactured by Manson. All the other parts will come from different sources: Brux Barrel 1-9", Action (Brand not decided yet), scope, trigger, etc. Hopefully I can put it together and report back the findings with some of the loads suggested here. Thanks to the ones who did the hard work for me! :D

I will custom machine my stock like I did with my Remington 700.
 
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Hello,

After reading this post and following for a few months I decided to build a 7mm .284 WIN rifle. As right now I sent 2 dummy rounds (3.305 COAL/2.256 OAL) for a reamer to be manufactured by Manson. All the other parts will come from different sources: Brux Barrel 1-9", Action (Brand not decided yet), scope, trigger, etc. Hopefully I can put it together and report back the findings with some of the loads suggested here. Thanks to the ones who did the hard work for me! :D

I will custom machine my stock like I did with my Remington 700.
TITO:

What freebore is MANSON coming back with and suggesting?
 
TITO:

What freebore is MANSON coming back with and suggesting?

Just sent them the samples (2) and they came with .210" and .319" diameter in the neck diameter. (I asked for .316"). My samples messured 3.305" COAL/2.555" to the ogive. I have to give them a call and see why the neck diameter was increased .003". As far as the freebore I have no clue of why they went with .210". Maybe that's based from the dummies but in the case I need to let them know that will be the shortest I will run my rounds. That measurement puts me about a 1/16" above the doughnuts. I might asked them to increase that freebore another .025" - .040" (.235-.250 freebore) to have room to play with the seating and other bullets (195gr). I call Monday and we'll see what they say.
 
Just sent them the samples (2) and they came with .210" and .319" diameter in the neck diameter. (I asked for .316"). My samples messured 3.305" COAL/2.555" to the ogive. I have to give them a call and see why the neck diameter was increased .003". As far as the freebore I have no clue of why they went with .210". Maybe that's based from the dummies but in the case I need to let them know that will be the shortest I will run my rounds. That measurement puts me about a 1/16" above the doughnuts. I might asked them to increase that freebore another .025" - .040" (.235-.250 freebore) to have room to play with the seating and other bullets (195gr). I call Monday and we'll see what they say.
If your going a no turn neck the .316” may not be enough, I had mine done originally at .316 and I couldn’t run a bullet into the brass after firing in unsized brass, so opened it up. When I ordered my own reamer from PTG I they sent a .319” which is working well so far, they also sent me a fb of .208” for the Hybrids, so far I’ve got about .020” jump and still above the donut..
 
My Shehane reamer FB is either.220 or .225 and I had the chamber throated a bit more to put 183 Sierra pills in front of the donut.
I hope this helps,

Lloyd
 
My Shehane reamer FB is either.220 or .225 and I had the chamber throated a bit more to put 183 Sierra pills in front of the donut.
I hope this helps,

Lloyd
TITO:

What freebore is MANSON coming back with and suggesting?

After calling Mr. Manson and discussing the idea of been able to shoot up to .195gr Bergers he suggested a freebore inbetween of .250-.265" that way I can go back and forth with both bullet weights.
 
After calling Mr. Manson and discussing the idea of been able to shoot up to .195gr Bergers he suggested a freebore inbetween of .250-.265" that way I can go back and forth with both bullet weights.
TITO: Thanks. Makes sense.
I’m currently running a .235” freebore with the 184 hybrids. Seating comfortably in front of the “donut” area .... with a modest jump to the lands.

Thanks for the info!
 

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