Heavily compressed loads

[Zero333]

As a side note...

Years ago I tried to find the max load in one of my 243win rifles with 105amax and H-4831sc.

3 range trips later I tested up to 45.8 gr with out any signs of pressure. In Winchester brass, 2,800" coal (kissing lands), and BR-2 primer.

 

[DLH_]

I will also be using BR-2 primers, I feel that the harder cups will help to provide me with a better idea of pressure than the GM210M's. I've noticed the same as others, the Federal's seem to flatten very easily even with mild loads.

 

[Kurz]

DHL_

In all honesty, why bother? Choose another powder which meets the full or nearly full loading requirements and enjoy the entire process instead of worrying and fussing.

I suggest using Re-16 which will yield the same or slightly higher velocities yet will be at 100% case fill (under the bullet) or slightly less. You'll like this powder and there are no worries about temperature stability either.

Also, a drop tube would help settle that powder, as would a little light tapping on the case.

These are two of the most common suggestions regarding how to settle the powder below the maximum capacity. The drop tube is a no brainer and takes just a couple of tenths of a second longer than the standard drop tube. No big deal. The vibration of a load can be accomplished while you're running your vibratory tumbler, cleaning other cases. Fill the case then hold it in contact with the vibratory tumble for a few seconds.

This can all be avoided by judicious selection of a different powder. We are in a terrific position now to have an ever increasing selection of a variety of powder suited to most circumstances. Don't get stuck, try a different powder.

 

[jpmimproved]

I am always wary of data that is not specific to the bullet I am using. 3 years ago I was loading 80 Gr Bergers over Varget in 223, and pierced a primer 0.1gr over minimum load. Bought a Berger book, max load was .5 grains under the minimum load from Hodgdon. I like my eyes and fingers more than the cost of a new load book.

 

[DLH_]

Just finished up my ladder test at 350 yards. No issues with pressure bar the top charge- 48.1gr is the maximum in my rifle. I will shoot another ladder with 0.3gr increments between 46.5 and 47.5gr to further refine the load. After that, seating depth adjustments.