Realistic 284 winchester velocities

datcajunshooter

datcajunshooter

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I just finished assembling my new rifle. As the title says. I was wondering what realistic velocities for the 284 winchester in a 22 inch barrel. The specs on the rifle are a 22 inch stainless mcgowen 1-9 twist 284 win barrel on a savage short action receiver. The mag allows for Coal of 2.990. The powders I have are AA4350 , RE-17, Ramshot Hunter, IMR 4831, and Win 748.

The bullets i have are Speer 130 FB hotcors, Sierra 140 grain HPBT(hunting),Barnes 145 grain LRX, and Nosler 150 grain Ballistic tips. Also thinking about some 120 grainers. I think they would be some fast, super flat shooting rounds.

The velocities in the reloading books seem to be a little low. I'm guessing the data is slower than I expected because of the rifles the round was made for? Modern Bolt action rifles should be able to hold more pressure than the model 88's I'm sure.
 
I have been shooting the 284 Win since the mid 80s. Back then the pet load mentioned by the first guy that worked with it in 1963 was Bob Hutton's load: 57 gr of IMR 4350 with a 140 Nosler partition for approximately 3050 fps from a 24" barrel.

I used 57 gr of IMR 4350 with a 140 Sierra Gameking in the beginning to take quite a few coues wt and javelina.

I switched to H4350, which was more temperature stable, and used it with quite a few bullets. When RL-17 showed I switched.


I had my current 284 win rifle altered with bullets seated to fit in a 3.1" SA mag box with OAL of 2.950". Winchester brass, fed 210 match primer, barrel is 23". My reamer is also custom with a short engagement distance to the lands with a 1 1/2 degree throat. I also have to turn the necks to fit the tighter chamber neck.

I used 140, 150 and 160 partitions on elk, 100 gr original X bullet, 140 and 162 bullets for coues wt. over the years.
That 100 gr X bullet using H4350 was close to 3600 but was a poor longer distance bullet. It is out of production now.

Finally settled on the 120 ballistic tip. I could add Steve Timm's comments on this bullet but it is a long one. I could PM it to you if you are interested.


120 gr NBT and RL-17. Please work up carefully to this stopping at 56 or 57.

57 gr is over 3400 fps.




I copied the load data from John Barsness's article on the 284. Unfortunately, he didn't try RL-17:

1735215814737.png
 
I have planned a .284 WIN in a Savage Elite Precision LA CIP length mag. Benchmark MTU 26" barrel. I want to seat a 162ELMD or 180 Berger long to take advantage of the case capacity. SAAMI COAL neuters the case. I'll get a JGS custom reamer to set my own case neck clearance & freebore.

What brass are you using? I have all new 200ct Norma, 100ct Lapua, and 100ct Lapua 6.5-284 to neck up. Then switch to Peterson when the pockets go out.
 
AZShooter said:
I had my current 284 win rifle altered with bullets seated to fit in a 3.1" SA mag box with OAL of 2.950". Winchester brass, fed 210 match primer, barrel is 23". My reamer is also custom with a short engagement distance to the lands with a 1 1/2 degree throat. I also have to turn the necks to fit the tighter chamber neck.
Click to expand...
Can you explain the benefit of 1.5 degree throat?
My .316 chamber 708AI needs turning to get 3 thou clearance. I figure set the 284 WIN custom .319 and dispense with neck turning. (Or whatever 3 thou would be considering the brass case neck thickness)
AZShooter said:
120 gr NBT and RL-17. Please work up carefully to this stopping at 56 or 57.

57 gr is over 3400 fps.

I copied the load data from John Barsness's article on the 284. Unfortunately, he didn't try RL-17:
Click to expand...
R17 is one of those pick your poison powders. It has worked great for me in a few cartridges, but then @VinceMule had to rain on my parade and point out how hot it burns! Lol W760 can get what R17 can do and do it cooler.
 
I built a 284 win with a 22" bbl on a 1958 husqvarna 3000 crown action. I have 90 rounds down it now. The rifle weighs 8 lb 4 oz with the scope. So it is light to me. Recoil management is necessary. I shoot with a suppressor. The first shot is always 1 MOA high. I have not gotten around to figuring out that part yet. But I have gotten the group size down around a half MOA by concentrating on recoil management. I found some 140 gr TGKs for cheap and bought 500. So my load for those is RL-16 at 3025 fps. 96% full; 100% burn; 58K psi. Last group 0.461" at 100 yds. OAL is 2.963" for a 0.015" jump.
1735222219809.png
 

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I load the Barnes 145 LRX and achieve 2925 fps with H4350 but the rifle is built on a long action and I load to over 3" in length. Don't recall the exact spec as I am away from my notes.

With any of 140-150s you are likely to be able to find an accurate load in the low 2825-2875 (or more) range without trouble with a COAL above 2.97 (assuming you are going to allow .020 for mag clearance). Plus or minus 100 fps is not going to make difference int performance of anything.
 
VarmintBob said:
I built a 284 win with a 22" bbl on a 1958 husqvarna 3000 crown action. I have 90 rounds down it now. The rifle weighs 8 lb 4 oz with the scope. So it is light to me. Recoil management is necessary. I shoot with a suppressor. The first shot is always 1 MOA high. I have not gotten around to figuring out that part yet. But I have gotten the group size down around a half MOA by concentrating on recoil management. I found some 140 gr TGKs for cheap and bought 500. So my load for those is RL-16 at 3025 fps. 96% full; 100% burn; 58K psi. Last group 0.461" at 100 yds.View attachment 628499
Click to expand...
I don't shoot suppressed, but a good friend only shoots suppressed and tells me the first shot is always a little different due to some dynamic in the expansion chamber of a suppressor.

ETA: https://www.silencershop.com/blog/w...You might notice that your,-round pop, or FRP.
 
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