Help with 270 load

[hub]

I am pretty new to the reloading part and i am wanting to load up some 270 for the up  comeing season. I have the new Nosler 7 book and acouple others. i will be loading the Nosler Accubond's in 140gr and Sierra Gameking's in 140gr. Now for the Noslers the book has the max load at 53.5 gr (IMR 4831) while others have the Max at 55.5. Thats a bit of a difference, Why is there such a big gap?  I'm useing IMR 4831 because i have it, I've looked and cant find much of powders around town. I have also heard from guys that there are loading the Accubonds with 56-58gr of powder and saying there safe...... thats 4.5 gr over max compaired to Nosler. 

Any help would be awesome.

You ask a good question on nosler listd max of 53.5. That is particularly interesting. Nosler manual -1 lists a 160 PT at 54 grains max and the 150 PT at 55 max. I suspect there test equipment and a common hunting rifle could be quite different. I have been using 56 grains of IMR-4831 with 140 PT,s and AB,s with absolutely no press signs. Velocity is 2920 with a 22 inch barrel. Start low and work up. Buy a chrony and avoid the guess work and sometimes suspect load data provided by bullet makers and powder makers. They have to worry about liability. 

[madmack76]

I always start mid range on the load. I have found that max load is always the least accurate for my rifle. Good choice with the 140s they shoot awesome.

[Z_rock01]

Ok went to the range yesterday and fired off some rounds. Now befor i start I must say what i did. i loaded up three round groups for both sierra and Nosler. I took there mid range (in the book) and loaded up by 1/2 gr. I started with Nosler at 52.0 gr and went up to 54.0 gr. My conclusion on this is I messed it up.. I didnt relize till after i had shot all my Noslers that I was shoot HORRABLE!! So i changed it up for the sierras, which I started at 53.5 gr up to 55.0 gr. I must say that 55.0 gr with 140gr Sierra HPBT was super! less then 1/2 MOA!! at 100 yards. So out of all fairness I am loading up more Noslers to give them a fighting chance. But I think i'm going to take it up to 56.0 gr??  not sure. What is your take on it, I have heard of guys going clear up to 58.0 gr. I don't think i'm going to go that high. Oh to mention there were no pressure signs that could be found so I think if i keep going in .5 groups i should be ok.

Thank you guys..
Jon

[bobcat]

Hodgdon shows 54.0 as max with IMR 4831. I would not go above that. While it may be safe, there's no reason to push the limit. You won't gain anything by using an extra grain or two of powder. I have reloaded the 270 Win. for many years, and I use 58 grains of H4831, which is also max according to Hodgdon.

[C-Money]

Very cool Z_rock, give those Noslers another try. At least you have a good sounding load with the Sierras that you know will work. 

[hub]

I know rifles can be quite different regarding pressures and velocity with a given charge. I started running noslers partitions using nosler reloading manual no-1back in the early 80,s It lists 55 gr.for the 150 and 57 for the 130 using IMR-4831. With the 140 I have used 56 gr. with no issues at all. 56 gr. grains of IMR-4831 will run 140 BT,s,AB,s and Partitions over 2900 in a 22 inch  barrel. My rifles will not get above 2800 with 58 gr. of H-4831sc. Obviously the IMR version is the speed king for me. why new school manuals show low charges with old school velocity. 

[akirkland]

As Sharkbait stated, 55 grains of 4831, 140 grain Accubonds, CI 200 primers.

[WoodlandShooter]

I am using three different powders in my 270...

H4350 for the 130s

H1000 for the 150s

Retumbo for the 165s

Lots of good info here, start low, work up...and then use a ladder test to determine either COAL or Charge weight...or even both...that way you can tune in a load to get good groupings

this is what I ended up with at 200 yards with the 150gr NABLR

[hub]

Those LRAB,s are looking good for sure. MOA at 200 yards is mighty fine.

[Z_rock01]

I have decited on what round i'm going to take in the woods this year. I'm going to use the 140 gr Sierra hpbt with 55.0 gr IMR 4831. I'll post pics at a later time, (at work sshhh dont tell the boss) I had 1/2" MOA at 100 yards (which in my book is ok). I could not get the Noslers to groupl well, At least that gives me something to play with this winter. Thank you for all the great info this has been fun...  untill next time

Wack-um and Stack-um 

[WoodlandShooter]

Those LRAB,s are looking good for sure. MOA at 200 yards is mighty fine.

it's 1/2 moa...

[Don Fischer]

I have decited on what round i'm going to take in the woods this year. I'm going to use the 140 gr Sierra hpbt with 55.0 gr IMR 4831. I'll post pics at a later time, (at work sshhh dont tell the boss) I had 1/2" MOA at 100 yards (which in my book is ok). I could not get the Noslers to groupl well, At least that gives me something to play with this winter. Thank you for all the great info this has been fun...  untill next time

Wack-um and Stack-um

That's just ok? I've had 1/2" rifles in the past but not now. My goal accuracy wise is close to 1" @ 100 as I can get. I've had more trouble getting Nosler's to shoot than not. I don't even try them anymore although I know a lot of people do like them.

[hub]

I get superb accuracy with AB,s. I have had excellent results with sierra bullets as well. I would take the 140 HPBT in a heart beat if thats the better accuracy round.