300BlkTalk

If you haven't found a Dillon trimmer yet, FFB is supposed to have more of their Honey Badger trim adapters in stock this week. By the time you get the adapter, router, bit (I am using a 3/8 carbide end mill), and vacuum shroud it ends up costing about the same as a Dillon, but I found it to be a go...

It's also usually possible to raise the hardness of wheelweight alloy bullets a bit through heat treatment. I forget for how long (I have it in my notes somewhere), but you put them on a cookie sheet in an oven at 400F (IIRC) and then dump directly into ice water (I used to do this for my 10mm loads...

My trim length is still within SAAMI spec of 1.348-1.368. Anyone find that accuracy drops off when cases are trimmed to the lower spec? In and of itself, the shorter trim length probably isn't going to have much effect on accuracy one way or another. But as demonstrated by Dellet and 20X11, how clo...

Sounds like you have done a lot more extensive testing than I did. My goal was inexpensive range ammo with decent accuracy from my carbines, and once I had achieved satisfactory performance I stopped there. Either way we are only talking about a 15 thou difference in OAL and I wasn't trying to tailo...

Yeah, being not specifically designed for blackout, it's a pretty short bullet, and you can't really seat it out as far as you would want to because you are limited on neck engagement. I had initially wanted to use a longer OAL but quickly found that was not practical and 2.06" was as long as I was ...

I am using a Lyman "M" die for case neck expansion and to give a very slight flare to the case mouth prior to seating the 125gr TNT, and it has worked out well for me. Without the use of the M die, even with chamfered necks, I was getting shaving of the TNT bullets.

I fired 3, five shot groups ranging from around 1 to 1.5 moa using this bullet out of my 10" Aero SBR, over 18.5gr W296 and a CCI450. Reformed Lake City brass, same OAL as you are using. Same load, out of my 16" Model 7 bolt action, fist sized groups at 100. It just didn't like them for some reason....

Get a Lyman "M" die.

I would probably trade some converted 300blk brass for 1x long colt.

I didn't see if you mentioned what press you will be using, but if interested, here is a review I wrote up of the MEC Sizemaster I recently purchased:

http://www.theguncounter.com/forum/view ... 40&t=29373