cleaning fired brass 101

[LRRPF52]

LRRPF52 I had already concluded that I liked only 1 operation per handle stroke, I know that the human/machine interface is important the feedback in keeping things consistent.
Double seating now that you bring it up also makes good sense.
After priming 10 rounds with the hand priming tool I am not too pleased with it just seems subpar thought it might be me I'm gonna see about the RCBS JR. as a dedicated priming station.

To everyone who replied I again want to say Thankyou your responses were exactly what I had hoped to get as the "New Kid" on the shop floor I needed this from the FOG's who have been there and done that, to save me from having to learn it the hard way and the advice will shorten my learning curve.

I loaded 5 .300 BLK's to the starting load data and tested them about 05:30 this morning and all went as it should, but I have a question about velocity variations I got a 30 FPS spread 1,495 to 1,525 with 3 1,505 to 1,509 Book called for 1,516 is that a reasonable spread or is does quality control need to be increased?

Especially with 300 Whisper/AAC/BLK, I would expect to see all kinds of extreme spread when loading rifle projectiles that aren’t meant for such low charge weights. Bill Alexander has a ton of experience dealing with the 300 Whisper as well, believe it or not, and has some interesting insights into it. The assortment of projectiles for .30 bores are primarily intended for high pressure, higher case volume cartridges that pressure up and drive the bullets into the lands with a lot more force, from cases that actually have a shoulder. .300 AAC is basically shooting a straight-walled pistol cartridge with superficial shoulders, with low propellant volume, and large rifle projectiles. This makes loading for 300 Blackout a challenge when looking at accuracy and consistency. He approached a pistol bullet company to make .30 cal pistol bullets for it as a result.

Alexander Arms has been making .300 AAC carbines and pistols for years and used to offer that ammo, but I don’t see it anymore.

There’s one guy I have seen so far who got his .300 BLK to shoot really tight groups, but everyone else has really struggled with them, including some of the top manufacturers in the industry. I wouldn’t sweat 30fps ES in the 300 BLK. That’s tight for that cartridge. Here’s a good article about this challenge:

300 BLK Accuracy Problems? Maybe it isn’t you...

Was I alone in my 300 BLK experience? Apparently not. I’ve gotten quite a few emails from shooters with experiences mirroring mine. Often they’ll ask something like, “I’ve been shooting and reloading for years, no matter what I try, I can’t get the gun to shoot better than 2 MOA, with an occasional 1 MOA group, why is this”?

It may only be me, but when I do encounter a 300 BLK that shoots, it’s often not a true 300 BLK. SAAMI specifies a 1 in 8? twist in order to stabilize the heavy loads, most of the uber accurate 300 BLKs you’ll see have a much slower twist to work with the supersonic loads.

So why do I think the 300 BLK isn’t an inherently accurate? Two reasons, case capacity and barrel twist.

The 300 BLK has such a small case you are effectively loading pistol powder into a rifle cartridge. This means smaller powder charges and faster powders. Not the best for accuracy. In many ways, the 300 BLK in design terms is the opposite of a modern match cartridge like the 6mm BR or 6.5×47 Lapua.