280 Rem Loaded to 270 win Pressure

[highoctane]

I'm sure this topic has been discussed as much as the grassy knoll shooter and I know the 280 Rem was hamstrung from it's inception with the auto loader that kept pressure down, however, the 280, in modern bolt actions, can handle the higher pressure of the 270 win.

I went to the range today and chrono'd a couple of my 280 loads. I said in an earlier thread that I really didn't care about how fast my loads were due to the ranges I shoot deer, (125-150 yds) but I was expecting a little better velocity, however, my 280 loads today were all "book" loads and were no where near the velocity of those book recipes. I understand the controlled environment, longer barrels etc play a huge roll in velocity but I also understand that those loads are shot and published to be safe and function in all firearms.

My question, are there any published loads for the 280 that take advantage of the higher 270 win pressure, or will I have to use 270 win data if I want to get to that higher pressure. I guess if push comes to shove I can always keep adding a little more powder and watch the chrono and case condition, which would be my least favorite way.

 

[SJB358]

Don't shoot the messenger, but for a 280 Rem, I pretty much use a 10 grain lighter bullet load data for a 270. Meaning, if I have 140's for the 280, I feel pretty comfortable using 130 data for a 270 Win. All else being equal they are twins. I wouldn't just blankly do that across the board, but it's a very good place to start.

 

[wvbuckbuster]

Not trying to be a wise guy but you pretty much answered your own question with your last paragraph. Scotty gave you good advice to reference but doing as you said will let you know what your rifle will like and tolerate. Case in point. I've been doing the same thing with my Tikka 6.5x55 using Hunter powder and a Hornady 129gr SP. Top end book load is nowhere near the velocity it shows in my rifle, as mine is lower. So, I keep adding a little more and doing ladder test looking for pressure and not getting crazy by any means. It'll come thru for you just takes a little time and effort. Just me.

 

[SJB358]

Not trying to be a wise guy but you pretty much answered your own question with your last paragraph. Scotty gave you good advice to reference but doing as you said will let you know what your rifle will like and tolerate. Case in point. I've been doing the same thing with my Tikka 6.5x55 using Hunter powder and a Hornady 129gr SP. Top end book load is nowhere near the velocity it shows in my rifle, as mine is lower. So, I keep adding a little more and doing ladder test looking for pressure and not getting crazy by any means. It'll come thru for you just takes a little time and effort. Just me.

QL is helpful with those ones as well. Just gives you an idea of where the top end is.

 

[highoctane]

Not trying to be a wise guy but you pretty much answered your own question with your last paragraph. Scotty gave you good advice to reference but doing as you said will let you know what your rifle will like and tolerate. Case in point. I've been doing the same thing with my Tikka 6.5x55 using Hunter powder and a Hornady 129gr SP. Top end book load is nowhere near the velocity it shows in my rifle, as mine is lower. So, I keep adding a little more and doing ladder test looking for pressure and not getting crazy by any means. It'll come thru for you just takes a little time and effort. Just me.

No offense taken! I figured adding powder and watching would be the way!

 

[grry10]

270 or 280 for the game they were intended they are hard to beat. I have a Remington 700 Mountain Rifle in 280. Loaded with 140s over 55.5 grains of IMR-4350 it has done everything I've asked in good fashion.

 

[highoctane]

270 or 280 for the game they were intended they are hard to beat. I have a Remington 700 Mountain Rifle in 280. Loaded with 140s over 55.5 grains of IMR-4350 it has done everything I've asked in good fashion.

I agree. I've had my Browning 280 for 30 yrs and have killed a dump truck load of deer and several hogs.

 

[SJB358]

My current favorite 280 load is a 140 Sierra SBT, Partition or BBC using RL26 for about 3150. It’s really a sweet load in my M725.

 

[PJGunner]

I used .270 data as a base for my .280 Rem. The only similarly common bullet is the 150 gr. So I reduced the .270 load and wworked up From there I sent to a 160 gr. Speer Grand Slam (older version) using WMR powder with is now long gone. My rifle is a custom on a DWM Argentine Mauser with a 24" barrel. I run that Speer bullet at 2910 FPS with excellent accuracy and good case life. I don't know if any of the powder burn charts show WMR anymore but it would pay to check out several charts before trying to determine where it lies in burning rate. It gives a good idea what to use for a start. JMHO, but I think one of the 4831s would be a good start. My preference would be the H4831 as it works well in my .270s. I just use WMR because I came across a smokin' deal for four 8 pound cans of the stuff and it'd great in the .270, .280 and .300 Wim. Mag. It totally sucks in the 30-06 and is extremely erratic. Probably why Winchester dumped it.
Paul B.