amp users for answers

[lyle2231]

Update …. Just checked, anneal first then anneal

Try this again… anneal then resize

 

[Sdvldog1371]

Not for converting. Verify this next comment, I recall the instructions suggesting you resize then anneal. On AMP site pdf instructions are available.

Pretty sure you always anneal before a resizing operation, not after. I smashed a bunch of lapua 260 rem down to 6.5 creedmoor and even made some 6mm dasher to see if it could be done. You start off usually with fired brass. You use Aztec mode and the proper pilot to analyze a representative case.

Then you lubricate and resize the case. If you're going from something like 308 win or 260 rem down to 6.5 creedmoor; you step the neck down and bump the shoulder back in a few operations. You anneal between operations. OR, because it isn't a huge leap down, you may be able to resize brass in 1 operation. Then fire form it. It depends. Some brass will just crush and flare out at the shoulder or the neck will get shoved down into the shoulder.

It's a process to make much smaller cases from larger cases. Requires a series of annealing, stepping the neck and shoulder down a small amount, changing the pilot to whichever case family the resized piece fits in, analyzing a new piece, re-annealing, repeating the size down, trimming excess, turning down the necks, new pilot, new analyze etc.. until your down to where you need to be. I think I burned 9 or so pieces trying get down to dasher from 260 rem. I did it outbof boredom and curiosity, I wouldn't want to go through that process unless I had no other option.

That being said. Going up is different. Say from 300 PRC to 30 Sherman mag, that is a fire form operation. You can either set bullets long so they are jammed when loaded, or use a mandrel to size the neck up one caliber and then use bushings to size most of the neck back down. That leaves a ring around the base of the neck that the case can headspace on, a false shoulder. The jamming method is the easiest for that and doesn't require additional annealing.

 

[lyle2231]

thinking about getting an amp for custom brass and would like feedback about pros and cons of the system.

i see there are code for preloaded info and codes for what each of your brass have generated for reuse for next use? question is when changing shoulder angle and/or neck size what is needed and how is this done?

more questions will follow after posted responses most likely.

i'm wanting a good understanding of the process before committing a purchase as i'm a long way from anyone that could be of an in-person help?

One more thing…. After 50 or so cases the unit has a two stage cooling fan . Leave it run unitil the fan reverts to low speed. Usually around 5-8 minutes. Just enough time to get another Pepsi.