223 Load Differences?

[josmund]

Relatively new to the reloading game. I know that you always follow published load data. I load for the 223 Remington and have been shooting a variety of bullets. Here's my question:

55 grain Hornady V-Max and 55 Nosler Varmageddon's appear to be very very similar bullets. When I look at the load data loading H335 the V-Max is 20.8 to 23.2. The Nosler is 23 - 25.

It strikes me strange to load the Nosler at volume considered dangerous for the Vmax.

 

[rcmodel]

Two different data sources, and test guns, and conditions.

And Hornady is notorious for being a little on the conservative side with load data compared to most other manuals.

As usual, take your pick, start at the start load, and work up while watching for flattened primers & such in YOUR rifle.

Not the test barrel they used in the manual.

rc

 

[Steve C]

There's small differences between bullets that make how easily they go down the bore change how much pressure a particular amount of powder may generate. The shape of one may make a greater bearing surface against the rifle bore, the material thickness may be different that may create more or less friction in the bore.

It may not be a pressure issue at all. The manuals often list loads in a range where the bullet performs the best and not to a SAAMI maximum pressure standard. The only thing they say is that their loads are "below" maximum SAAMI standard not that they meet it.


Nosler Varmageddon


Hornady V-Max

 

[steve4102]

I try and gather as much data as I can. Usually at least 5 sources. When they differ greatly, I through out the high and the low, and start my load development.

 

[josmund]

Thanks for the feedback.

I'll stick to published data and watch my primers. I think my greatest concern is the ability to know when I'm getting too much pressure.