OK many years ago I stocked 5 or 6 MKX barreled actions then loaded ammo for each. (before I wised up and started fearing a lawsuit) I found that ALL shot the same load of 130gr and I believe H4831 ($1/lb) surplus.

Now I have purchased my own MKX 270 and for the life of me can't find those load records.

Seems like it was in the 57gr range but that is total memory.

Anyone have a load similar?

OK second time through all my records I found it written in the back of my 40+ year old sierra manual. The old plastic 3 ring binder.

Flat base 130gr and 60grs of H4831 at 3.34"

Second notation is 57grs of IMR4831

Paul, the IMR and Hodgdon are different powders, but for many years I shot 59 grains of IMR 4831 behind a Speer 13-grain Grand Slam, lit by a CCI-200 and seated about .010" off the lands.

I am thinking your 60 grains of the Hodgdon verson might be just about right, and just about all the powder you can get into the case and still seat the bullet without it popping back out!

quote:

the IMR and Hodgdon are different powders

Yep IMR is around 3grs hotter. Looking at some other data I have loads with IMR are 3-4grs lower than same bullet and H4831.

Sure miss being able to go in and buy that surplus H4831 for $1/lb. Lots of things cost more 40 years later.

Somewhere in time I read in one of the loading manuals that " The 270 with 60 grains of H4831 and a 130 grain bullet made Jack O'Connor famous, so it will work for you too . ."

Something close to that.

quote:

The 270 with 60 grains of H4831 and a 130 grain bullet made Jack O'Connor famous

40+ years ago I probably read the same article

Over the years I've loaded for at least seven different 270s. Every one of them shot extremely well with 130 grain bullets and 60.0 H-4831. Yes, Jack O. got there first, but it is my "magic" 270 load. Recently I have had good success with 58.0 of IMR-4831 although I haven't used it in enough different rifles to achieve the same level of absolute trust I have in the H-4831 load.

Does that load work with the newer Extreme version of H4831 - H4831SC?

My old friend Sam, RIP, was a 270 true believer. That was back in the 50's. His load: Fill the case with Bruce Hogdon's surplus 4831 and cram a 130 grain bullet on top. Incidentally, I read in Wikipedia recently that the 4831 was not machine gun powder, but was used in 20mm AA rounds. The gun name was Oedinger, or something close to that. It was a rapid fire type wherein the bolt did not lock. Rather, the gun fired as the bolt was moving forward, and the momentum absorbed the pressure. Factoid of the day.

I shoot 59 grns of H4831SC under any 130 in my .270 with great results

I'm a wimp, apparently. I only load 53.7g with a 130g SST. Shoots very well. Certainly not as hot as it could be, but my shoulder appreciates it.

Doug,

Shot placement beats speed every time.

After having both shoulders operated on I too, appreciate relative lack of recoil

I've shot a 270 Win since 1970 and Started reloading about that time too.
We also used a TON of the old 4831 surplus until we ran out.
We were forced to convert to the IMR4831 (57grs) and it was redily available since I worked in a gun/sporting goods store for 25 years.

I have no idea of the velocity since back in those days a chronograph would have only been a dream.

The old surplus powder and the newer (of any variant) is NOT the same and should be approached as such.

Zeke

"""Shot placement beats speed every time""".

True but it's sure fun to have both!
Sorry to hear about your shoulders. bummer dude!
Zeke

quote:

Originally posted by gab:
Doug,

Shot placement beats speed every time.

After having both shoulders operated on I too, appreciate relative lack of recoil

Yep, pretty much my thought process as well. Rifle/Load will provide MOA accuracy; me....Minute of Deer accuracy.

I had rotator cuff done and was just sensitized.

Sorry about your shoulders; are you on the mend?

I also have a couple old 3 ring binders with loading data that I have compiled starting back in the early 1970's . I had quite a supply of the old surplus 4831 . Thought it would last a lifetime, but it is long gone. 59 or 60 grs of that old 4831 with a 130 gr bullet would shoot in just about any 270. With the new H 4831 I find 57 or 58 grs to be very close to max in many 270's that I load for. I think the new powder is a touch faster than the old surplus 4831.

I got my first .270 chambered rifle in about 1963 and have not been without at least one so chambered since. In my safe at the moment, I have five. Many years ago, I settled on a load of 59.5 grains of H4831, any good 130 grain bullet, and either CCI or Federal Large Rifle primers. I switched from regular H-4831 to the Short Cut variety when it first came out using the same load. I presently have one rifle, a custom Heym SR-20, in which the 59.5 grain load is a bit hot. For it only, I've cut the load to 58.0 grains. All my .270's have 22 inch barrels and my fastest one, my old David Miller custom gets 3140 fps with that load, the other four get around 2900-2950, including the Heym with the 58.0 grain loading.

I'm aware that O'Connor used a 60.0 grain load for many years, and toward the end of his career, he was using 62.0 grains. He must have used a really neat drop-tube as I can't get 62.0 grains into my cases. I tried 60.0 grains but the accuracy wasn't as good as my 59.5 grain loading. I've found to my satisfaction that if a .270 chambered rifle won't shoot the 59.5 grain load well, it won't shoot anything well.

TT

I found that 59.5gr of 4831sc was my most accurate load, however, I was showing signs of being too hot. I backed off in .5 gr increments, but lost accuracy until I hit 57gr. This is where I settled. Accuracy is slightly less than 59.5gr, but still very good. This is with a Remington 700 shooting 130gr NBT with CCI 200 primers, .010 off the lands.

Mike

That all goes to prove that each rifle is pretty unique in and of itself. I've used the 59.5 grain load for at least forty years and in a multitude of different rifles, and with the exception of the Heym custom I mentioned, no other has ever shown any signs of excess pressure. Don Allen of Dakota put the Heym custom together for me and I'm sure the it has a "tight" match chamber. Whatever the cause, It is the only rifle that has come my way the gave pressure signs with that load.

TT

My go-to load for my 270Win is with a 140 grain Hornady IL bullet. I use 59 grains of H4831 and a CCI #200 large rifle primer. After I found this load working up in small increments I loaded another small batch of this charge weight and tried them to make sure they were as accurate as in my first trial but had mistakenly used WLRP Winchester primers. I was seeing serious over-pressure and the accuracy was horrible. After seeing my mistake I made the third batch and the accuracy was back to .25 MOA. The 270 and H4831 go together like bread and butter!