Hornady load data

[Stew0576]

Hello all, was wondering if someone with a Hornady book could give me some information, I've looked in Speer and Sierra books I have, I'm loading .270 caliber using hornady 140 grain sst, cci 200 primers, h4831 powder, seating to the canalear at 3.215, load data I've been able to work up said 54 to 58 grains but at 57 grains I'm seeing compressed loads so wanted to check with you guys

 

[brasscollector]

Both of my Hornady manuals (9&10) show 59.9gr of H4831 as the max, somewhere around 3000 fps. Neither one indicates a compressed load but I'm not sure the Hornady manuals even indicate when it's a maximum, compressed load. Hodgdons online resource indicates a 58.0gr load is compressed, but they aren't using a Hornady bullet and COAL is longer too (3.28"). FWIW Hornadys data uses Hornady cases and Hodgdons data uses Winchester.

 

[ArchAngelCD]

Of course my Hornady manuals show the same numbers. I just wanted to say, there is nothing wrong with a compressed load other than it pushing the bullet back out when the compression is drastic. It's not dangerous to compress a load with most powders. You post seems to indicate you think compression is bad. Sorry if I got the wrong impression.

Did you find an accurate load yet?

 

[stringnut]

Compressed loads are fine as has been pointed out.. Sometimes it is even hard to fit all the powder in the case. IMR 4350 max loads for 7x57 and 139 gr Hornady interlock have to be dropped thru a funnel to fit it all in the case. Using published data you shouldn't have an issue.

 

[Stew0576]

It makes me nervous, I'm seeing minor denting in the bullet and not achieving the same seeing depth, will be testing these on 4 different rifles on the first, going to watch cases closely

 

[Blue68f100]

If your concern about compressed loads, tap the case to settle the powder and see how much air gap there actually is. I don't mind compressed loads on stick/extruded powders. It's the ball powders that I do not want to compress.

Any particularly reason why your crimping the bullet? The only ones I have ever crimped in over 4 decades, where ones fed by tubular magazine. There is no reason to crimp on a rifle round, neck tension should hold the bullet. In most cases you loose accuracy crimping.

 

[Stew0576]

I always crimp, figure bullet makers say crimp so I crimp, still new to reloading, when I find a accurate load I will try without crimping and see what happens

 

[Ken T]

I've never crimped a rifle cartridge.No need to do so.I believe it's recommended with tubular magazines but I don't own any such rifles

 

[25-20 WCF]

Zero reason to crimp a .270 bullet. Most available bullets do not even have a crimp groove. Just because the factory does it doesn’t mean you have to.

.

 

[horsey300]

I always crimp, figure bullet makers say crimp so I crimp, still new to reloading, when I find a accurate load I will try without crimping and see what happens

Crimping or lack thereof can dictate a slight change in charge weight (pressure changes) but does add to accuracy, a non crimped bullet is straight in the case, a crimped bullet has a fulcrum point pressed into it to teeter out of true straightness.

 

[ArchAngelCD]

I also feel rifle ammo should not be crimped in most cases. I of course crimp levergun ammo but I also like to put a slight crimp on my 223 ammo meant for 30 round magazines. I worry about the recoil effecting the bullets. That said I really mean slight and I do the same for 30-06 M1 Garand ammo. I'm not saying everyone should, only that I do and it's in the form of a FCD.