Post Your AMP Press Plots

Dogtown said:

• FL Size with SAC neck/shoulder bushing on annealed brass
• Dry tumble to remove lube
• Neolube #2 inside necks
• Mandrel up to 0.002" neck tension (pin gauge test to confirm every ten or so)
• trim/chamfer

I generally store the brass after tumbling and when I'm ready to do a session for a particular load, I pull some of that brass and then do the final prep. Sometimes I'll re-apply Neolube after running the mandrel, and I like doing the chamfer as the last step as a way to help keep track (easy to see the clean cut brass with lubed necks).

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Mine is very similar, though I use Unique Lube and just wipe it off - so no need to dry tumble after sizing. I use moly pre-mandrel and neolube as the last step before prime/charge/seat

Dogtown said:

That’s actually a good idea; I may just use dry neck lube pre-mandrel and finish with Neolube

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I used to clean out the dry lube after using the mandrel, but found it made no difference - might actually help things. It's an extra step, so taking it out saves some time. Now I'm experimenting with:

For each case in succession:

1) Case lube using Unique
2) Size
3) Immediately dip neck in dry lube
4) Wipe clean the outside of the case of both Unique and excess dry lube
5) Place in tray for mandrel step

Makes things a little faster. I was a bit worried about the application media sticking to the Unique on the outside of the case neck, but it hasn't happened so far (one batch in).

This weekend I finally loaded up some rounds and got to the range after a couple months of dealing with a back issue. There was no way that I was going to continue my load dev on my 37XC my first time out after my back just weeks earlier was prohibiting me from even getting out of bed.

So, I decided to do some testing with my 6 BRA. I've made the switch to N540, and got to a point where I got some good SDs, but still needed to do seating depth testing. I ended up loading a bunch of rounds, setting them to .015" off. The last time out, I used moly for mandrel lube then neolube for seating.

Here is the AMP plot from the double moly:


This was a total of 70 rounds - 66 fell within 9 lbs of seating force and 63 within 8 lbs.

This is a very similar spread to what I got the last time I used double moly (November):


Here is a plot of rounds I did in December using moly then neolube:

This is actually a little wider than the double moly - which is opposite of what I get on my 300PRC, 308 and 37XC where neolube tends to deliver slightly tighter results.

In case you're interested, I used a handful of rounds as foulers then started the testing.

Throughout the test and follow up validation, I kept one group going on the Garmin:


Here is the seating depth I settled on (.033" off):


I'm not dramatically happy with the group size because I know the rifle is capable of more - I'd like a 10-shot group to be more in the .3 range - but then the wind was blowing and the target was moving backward and forward at times, so I think this is close. I am decently happy with the SDs, as they held up against my initial assessment and are close to what I got on my last barrel - I'd typically get mid-4s.