280ai vs 284 Winchester

VLD Pilot

Well-Known Member
Joined
Dec 24, 2017
Messages
1,580
Location
Northern, Mi
If people have feed issues with their 284s, it's curable. It's not common. I've had several DBM 284s and zero problems. They feed as good as any 308 mag fed rifle.
 

Turnbolt53

Well-Known Member
Joined
Dec 18, 2018
Messages
128
Location
SE Wisconsin
No issues with my kimber 84 L ejecting cartridges. And 120 ttsx hits 3064 FPS. But maybe I got lucky with mine. It has a permanent home now b

I am getting 3030 from my 84L 280AI with the 160 Accubond and RL26, and great accuracy.

Have not shot the 120 ttsx, but Barnes load data shows 3474 max.

Ballistics are identical to the 7SAUM.
 
Last edited:

jaservices

New Member
Joined
Jan 21, 2014
Messages
2
Finally completed a build of a 25 x 284 that I started many years ago. The action is a Model 1909 Mauser with a 24" Douglas Premium 3 Twist barrel, started this build so long ago I am not sure what some of that means. Am looking for advise on powder charge of H4350 or H4831 behind Hornady 117 Grain SST pills, using Winchester Large Rifle primers tucked into Lapua Brass.

Thank everyone in advance!!
 

Unoboats

Well-Known Member
LRH Team Member
Joined
Jun 22, 2012
Messages
1,042
Location
North Carolina
I am getting 3030 from my 84L 280AI with the 160 Accubond and RL26, and great accuracy.

Have not shot the 120 ttsx, but Barnes load data shows 3474 max.

Ballistics are identical to the 7SAUM.
Mine is a 284 win not a 280ai. But those are impressive numbers
 

VLD Pilot

Well-Known Member
Joined
Dec 24, 2017
Messages
1,580
Location
Northern, Mi
H4831/4350 are typical "Go Too" powders for the .284s. While they don't offer top velocities, they do offer the best of accuracy. I swapped out those for RL17 and most recently RL23 for higher velocities when needed. In my SA 284 with the 162s, I wanted 3000 fps. Didn't know if it was achievable in a SA but I found out it was. Typically you need a LA for that kind of speed but I swapped out the LA for RL17. Haven't looked back. I do go back to the H4831/4350s for banging steel and shooting ground hogs at distance.
 

jaservices

New Member
Joined
Jan 21, 2014
Messages
2
H4831/4350 are typical "Go Too" powders for the .284s. While they don't offer top velocities, they do offer the best of accuracy. I swapped out those for RL17 and most recently RL23 for higher velocities when needed. In my SA 284 with the 162s, I wanted 3000 fps. Didn't know if it was achievable in a SA but I found out it was. Typically you need a LA for that kind of speed but I swapped out the LA for RL17. Haven't looked back. I do go back to the H4831/4350s for banging steel and shooting ground hogs at distance.
The rifle will be used primarily for hunting out to maybe 500 yds. Thank you for the input.
 

COBrad

Well-Known Member
Joined
Jan 4, 2004
Messages
1,349
Location
Western Colorado
A2BF8C62-52D0-4512-A383-F6D0C05B7BB5.jpegBB823891-8CFE-4C39-878E-CC9FCD02C5E6.jpeg
Doing load development the past two days with H4350 and 168 grain Matchkings in a New Ultra Light Arms .284. The 200 yd group was great but heavy bolt lift with a 51 grain charge. Dropped 1 grain and reshot today at 130 yds. Yesterday was testing seating depth and the 200 yd group was best, seated -.010 from the lands.
 

Rhino55

Well-Known Member
LRH Team Member
Joined
Jan 5, 2012
Messages
237
Location
Oklahoma
View attachment 243355View attachment 243356
Doing load development the past two days with H4350 and 168 grain Matchkings in a New Ultra Light Arms .284. The 200 yd group was great but heavy bolt lift with a 51 grain charge. Dropped 1 grain and reshot today at 130 yds. Yesterday was testing seating depth and the 200 yd group was best, seated -.010 from the lands.
Look at H1000 or Retumbo. Yes they are magmun powders but they shoot great in my 6.5x284
 

COBrad

Well-Known Member
Joined
Jan 4, 2004
Messages
1,349
Location
Western Colorado
My 160 grain Accubond hunting load uses H4831sc and I’m getting a compressed load before I see pressure. Mag length on this rifle is 3”. I’ll stick with the 4350 for the MK’s and do further load testing with faster powders with the accubonds to see if I can get more speed. I don’t believe slower powders will move me in that direction with these bullets and mag restrictions. I believe Forbes was targeting 140 grain bullets.
 

VLD Pilot

Well-Known Member
Joined
Dec 24, 2017
Messages
1,580
Location
Northern, Mi
My 160 grain Accubond hunting load uses H4831sc and I’m getting a compressed load before I see pressure. Mag length on this rifle is 3”. I’ll stick with the 4350 for the MK’s and do further load testing with faster powders with the accubonds to see if I can get more speed. I don’t believe slower powders will move me in that direction with these bullets and mag restrictions. I believe Forbes was targeting 140 grain bullets.
What velocities are you seeing with the 4350 ? At 2.975, I was getting around 2900-2925 with 4350 with the 160 Accubonds. 25" barrel. 4831 was slower.
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 
Top