284 and 180 hybrids

[rwh38238]

Tell me about them with the 284
Powder? Charge weight?
Jump or Jamb?
Velocity and SD?
Tell me whatever you can. I'm going to chamber my new Brux next week and need a starting point!
Thanks

 

[TonyR]

I have been using the Hybrids in my 284 Shehane 0.010 inches off the lands with the bullets seated out in the neck with a Cartridge Overall Length of 3.245 inches. Go to the 7mm Cartridge guide on this site and use the freebore shown on the Shehane reamer print. The Shehane is just a little wider at the shoulder. The cases are the same othewise. Velocity, SD, powder charge will depend on your barrel. Start low and work up slowly. Powders that have worked well for me are H4350, H4831SC, and IMR7828SSC. Others have good success with RL-17 and VV N560. I have done some testing with those and Norma MRP, but my best results have been with the first three I mentioned.

 

[DMAC67]

I use the 180 Hybrids in a straight .284 Below are the two powders and charge weights I use. AS ALWAYS , THESE ARE SAFE IN MY RIFLE>>>(Standard Disclaimer....) I can tell you that they are not really hot loads but are VERY accurate and consistant.

H-4350 = 51.3 grains velocity ave. 2845fps ES 14

H4831SC = 54.5 grains velocity ave. 2880 fps ES 18

I jam them .0015" They are lit by a Russian Wolf LR primer in neck turned Lapua brass with .0002" neck tension.

The barrel is a Brux 30" 1.25" straight with a 1-9" twist. hope that helps

 

[Erik Cortina]

I use the 180 Hybrids in a straight .284 Below are the two powders and charge weights I use. AS ALWAYS , THESE ARE SAFE IN MY RIFLE>>>(Standard Disclaimer....) I can tell you that they are not really hot loads but are VERY accurate and consistant.

H-4350 = 51.3 grains velocity ave. 2845fps ES 14

H4831SC = 54.5 grains velocity ave. 2880 fps ES 18

I jam them .0015" They are lit by a Russian Wolf LR primer in neck turned Lapua brass with .0002" neck tension.

The barrel is a Brux 30" 1.25" straight with a 1-9" twist. hope that helps

Hey Doug, I think you meant .002" neck tension and you jam .015"?

By the way, I'm joining the "Straight 284" club, no more 284 Shehane for me!

 

[1967spud]

whty no more for the shehane?

 

[Erik Cortina]

whty no more for the shehane?

Because I'm building short magnum and the Shehane and the Magnum would be too close performance wise. So I'm building a straight 284 now since I won't need the speed of the Shehane anymore. The 284 Shehane is a great cartridge by the way.

 

[1967spud]

glad to hear it as i am now haing one smiffed

 

[Erik Cortina]

glad to hear it as i am now haing one smiffed

You'll be happy with it. My 284 Shehane would shoot the 180's at 2,970 fps. with VV N560 out if a 30" bbl, and very accurate as well.

 

[1967spud]

im going to try the 180 vlds over reloader 17


as you can see here http://www.youtube.com/playlist?list=PL6EB7883DC094122C&feature=mh_lolz

 

[arizonajake]

This message thread got my interest and, if y'all don't mind, I'd like to ask you .284 Win./Shehane folks a couple of questions:

I just obtained a Shilen barrel in 7mm for installing it on my Winchester M-70 for long range hunting. The barrel's final dimensions will be 0.700" dia. at the muzzle and 26" long. Since it seems I will have to order a reamer for my gunsmith to chamber the rifle, due to the fact that the gunsmiths I have contacted don't own one and say most customers supply their own, I was wondering if a "Shehane"-dimensioned reamer can also be used to modify a set of Redding .284 Win. dies. If not, I will go with the straight .284.

Also, can a reamer be ordered from PT & G with a throat dimension to allow for maximum case capacity with 160-180 grain bullets?

Can anyone recommend a good gunsmith in the Phoenix, AZ area to do this?

Any an all help will be greatly appreciated. Thanks in advance.

 

[TonyR]

It soulds like you would be better off with the straight 284. You can't run a Shehane chamber into any factory resizing die for two reasons. First, the resizing dies are hardened and the reamer will not cut the steel. Second, you would need a smaller resize reamer to cut the die even if it hadn't been hardened. You also need to look at the length of your magazine. A 180 VLD or Hybrid will be somewhere in the 3.200 to 3.250 inches long with the bullet seated so none of the shank is in the case.

 

[arizonajake]

Thank you, Tony,

I'll go with the straight .284. As far the cartridge length goes, that will be no problem, since the rifle uses a long action and I can seat Bullets to a COAL of 3.35 inches.

 

[TonyR]

Thank you, Tony,

I'll go with the straight .284. As far the cartridge length goes, that will be no problem, since the rifle uses a long action and I can seat Bullets to a COAL of 3.35 inches.

For your hunting rifle, you should look seriously at H4350. This weekend, I used a excellent load I had developed in 60 degree temperatures at a match where temps were over 100 degrees. It has performed the same at both temps. It would seem to be a great choice for a hunting rifle.

 

[arizonajake]

Yep, I use H4350 and H4831 in my .260 Rem. rifles and H 4350 for my .243 and 30-06, as well as H4831 for my 25-06 Ackley. I will be developing loads with both powders.

Thanks!

 

[DMAC67]

azjake,

H-4350 and H-4831Sc are OUTSTANDING powders for the straight .284 ! Good velocity but much more important is CONSISTANT velocities. Very low ES and SD less than .5moa groups in my F-class rifle.

If you are using a 26" barrel in a hunting rifle you may not benifit from the slow burning 4831. Try
H-4350 start at 49.5 and work up to 51.5, I'll bet you find an excellent load somewhere in there...

Good luck and let us know what you find. There is a lot of load data here for 30" barrelled F-class guns but not enough info for 24-26" barrelled huntin guns. Since I am set up for the caliber and have tons of components it only makes sense for me to set up one of my huntin rifles for a .284 !

 

[arizonajake]

Thank y'all all the info. I should have everything ready to go by the end of the year. I'll start with Hornady 139 SST's and IMR4350 to fire-form the brass and break-in the barrel, then develop loads with Sierra 168 gr. MKs and Berger 168 gr. VLDs and H4350 powder, using Winchester prepped brass and Wolf Russian primers. I plan on repeating the process with H4831 powder. Once the dust settles and an optimum load is arrived at, I'll move on to Berger 180 VLDs.

Regards,

 

[1967spud]

good luck with it jake , keep me informed on how you get on with uit please

thanks spud

 

[Switchbarrel]

Can anyone recommend a good gunsmith in the Phoenix, AZ area to do this?

I've had Gary O'cock build a rifle and chamber a couple barrels for me. Been quite happy with his work. He and the rifles he builds have
been known to win a match or two.

G.O. Precision
Surprise, Az.

-Rick

 

[Travelor]

Rick, I too have had Mr. Gary Ocock build a rifle for me, a 284 Win that I am shooting 180 Hybrids in F/Open for 1000 yards. The gun has won all the matches I have shot it in although none are "big" matches. It shoots iddy bitty groups and I just love it.

FYI I am shooting 54.2 gr of H4831SC with the bullet jammed .020" and Wolf LR primers in Lapu 6.5x284 cases necked up and turned for the 284 Win cartridge.

Love then gun so much I am having him build a F/TR rifle for me now.

George