Hogdon Hornady specs. Getting way different info.

[Barefoot1]

I am going to be reloading some 270 rounds and have chosen to use H4831 as I use this in my 7mm mag. I will be using Hornady 130 interlock spire points, Winchester and Federal brass. I have the Hogdon data that is calling for a starting load of 56.5 and max load of 60 grains. Have also been given the Hornady specs for the same powder/bullet they claim a low of 60.1 grns and a max of 62.0 grns. Can anybody shed any light on this. Don't want to have to pull any bullets because of bad data.

 

[oneounceload]

Personally, I would go with the powder maker's data as they do the pressure testing.

 

[Barefoot1]

Thanks, that is a good point. I have also seen some recommended recipes that claim 59.5 works well for them. I will probably start lower and work up, but avoid the Hndy info unless there is someone who can explain why they are so much higher.

 

[evtSmtx]

I'm not sure how responsive hornady is but I would ask them. If it's valid they should be able to tell you why. If you've spotted an error they can correct it and save somebody a busted rifle and/or injury

 

[gamestalker]

It's just a part of the process and can only be resolved by using the "work up" approach until you've established some load history with the powders and cartridges you load with and for.

It's rare, if ever, that you'll not have conflicting tables from the various publishers. I honestly can't think of a powder and cartridge that doesn't have conflicting tables. Life was so much more simplistic before the internet, reason being, you usually didn't have access to every published data source on the planet.

GS

 

[steve4102]

I am going to be reloading some 270 rounds and have chosen to use H4831 as I use this in my 7mm mag. I will be using Hornady 130 interlock spire points, Winchester and Federal brass. I have the Hogdon data that is calling for a starting load of 56.5 and max load of 60 grains. Have also been given the Hornady specs for the same powder/bullet they claim a low of 60.1 grns and a max of 62.0 grns. Can anybody shed any light on this. Don't want to have to pull any bullets because of bad data.

You were "given" data by whom?

The data you were given is in error and incorrect. Avoid this person at all costs.

Hornady #7 lists,

270 Win
130gr Bullets.

H-4831, Start=52.3gr........Max=62.0gr.

 

[GooseGestapo]

One of the "HANDLOADER Magazine" contributors recently did an article on the "H4831" .270 loads. I suggest you look it up.
Congratulations, you've chosen an excellent component set.
Suggestions;
1. Segregate your brass. Though the differences aren't great, there are differences. Federal brass tends to be softer, with the primer pockets opening up sooner.
2. Different rifles have different throats and chambers, and this affects pressures, this means different powder charges. All but one of the .270's I've dealt with tolerated as much as 62.0 gr, but shot better with 60.0. One maxed at 59.0, and wanted 57.5gr.
I suggest you start at 57 gr and load two rounds and fire two shot groups up to 62 gr.
Load and group 5 of the two best two shots groups.
The 130 gr Hornady is one of my two favorite.270 bullets. ( Sierra 140gr GameKing is other)
Personally, I'd load some at 58, some at 60. Shoot and see. No point in reinventing the wheel.
If not happy with results, my go-to load is 54.0 gr of IMR4350 or 55.0 H4350. With either of these and either 130gr Hornady or Sierra "ProHunter" (flat base bullets), my Interarms MkX Mauser will shot 5/8" clover-leafs at 100yds. The H4350 load hits 3,100fps.

For all out performance from the .270, get some Wichester Mag. large rifle primers, and 64.0gr of Magpro (max load, approach carefully). Hits 3,200 from my gun.
But not remarkably better than your chosen H4831.