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Once I get the new barrel I'll be retesting to verify powder charge is still good then test the seating depth to see if I can get the groups to tighten up (i.e. tune the load to the barrel harmonics), The 280gr LRX is long. Somewhere in this group of threads there are some measurements that I...

Same here. As soon as a barrel was available I bought one, unfortunately. I have a 6 twist for my Ruger American in 300BLK. I haven't shot it yet. Too many projects and not enough time. I'm certain I was switched at birth and should have been wealthy with plenty of free time. I've got to keep...

Out of curiosity I rearranged the sonic velocity equation to solve for temperature (deg F) and I got this (last row). I used the average velocity for the calculation so if you're close to or above the temperature shown you'll want a load with a tight ES. So what does it tell you? It tells you...

I had pretty good sub performance with N133 and the 280gr Barnes LRX BT. Unfortunately I had Chronograph (user) issues. The 12" Faxon barrel is such a pile of crap that I suspended testing until my new barrel comes. AR10 platform with a Dead Air Primal btw. I have other tests beside this one...

An F Class shooter gave me the following advice: Powder Charge <30gr: 0.1gr steps / Fine Powder: 0.05gr steps <= 60gr: 0.2gr steps / Fine Powder: 0.1gr steps 60-100gr: 0.5gr steps / Fine Powder: 0.25gr steps >= 100gr: 1gr steps / Fine Powder: 0.5gr steps Seating Depth Best: (Amp Press and SAC...

Alpha brass is first class stuff. It's shipped in a 100 count case. A nice one. The necks aren't all banged up and the brass is very consistent. Much better than Q or some of the other sources. I'm not going to load any of it until the new barrel comes in.

I'm on the road this evening so I don't have my load data with me. I was supposed to put it in the pickup before I left but that didn't happen for some reason. It was 30 degrees cooler today than the last time I shot. 53 deg. F. The load sequence was just a continuation of that prior load test...

I've got most of a jug of Trail Boss. I never thought about loading 8.6 with that. I used to load .308 subs with it. I may have loaded 100 rounds out of the jug. That was way back when life was simple and I didn't think I needed to reload every freaking caliber made. Well not all of them, just...

Looking at the burn rate chart: CFE Blk is fastest (74) N130 is slower (84) N133 is a little slower (89) The trouble with the burn rate chart is that it's not linear. If you're looking for case fill N133 might get you where you want to go.

i just did a backyard test, 1 round each, on 19.6g, 19.7g. and 19.8g of N133. 78 degrees. Speed of sound is 1,136-ish fps. There was a definite crack for all three rounds. 19.6g N133 1,143.3 fps 19.7g N133 1,150.6 fps <-- this is possibly the hot summer day load. 19.8g N133 1,166.3 fps

^^ Post #715 and #719. Depending on the temperature, N133 might get to 65%. 18.9gr of N133 is about 62.7%. That averaged about 1,134fps. The next round of testing starts at 19.0gr. I'm looking for subsonic at 90 - 100 deg F, 1,149 to 1,159. 90 to 95 is a TX Gulf Coast summer. The next test...

Onward thru the fog. I had a short weather window so I sacked everything up and made the 45m trek to the range to shoot out what I thought was the final supersonic test. It's not. You see... the speed of sound changes with air temperature. A table of values would look something like this (it was...

I haven't but I've got the time and brass to load some today. I really need to see if the 280gr LRX will perform with subs before I get too excited about loading it. If I can find a good ES that groups with CFE Black that might be useful. I'm not optimistic about finding "groups" with the...

I was supposed go fly this morning but the weather is not the best today. I went full on "science" and measured case fill for the 17.6gr N133 charge. I'll check it when I load the larger charges in a bit. I hit post after I've done some checking. I used a "SAMMI spec" wooden dowel that fits...

I've got 10 loaded. I hope to do a hog test on Friday or Saturday. I think I'll load 10 more and see what a 10 shot group, at a 100, looks like. I just looked, every case I have is large rifle pockets. I've reloaded a lot of the early Gorilla case 1 or 2 times, no more than that, and the primer...

I shot my N133 subsonic test today (03/13/24 since I forgot to date the spreadsheet). It was windy but the wind was from the south and I shot to the north. The pistol berms and trees around the range do a good job of blocking / lifting the wind to some degree. Aero Precision M5 upper and lower...

Faxon was the only game in town when I bought my barrel. In simple terms, it's a pile of crap. I don't think I'd trust it for a tent stake. The "torn rifling", drilling the gas port through edge of a land and groove, and the extremely small diameter of the barrel make the Faxon barrel no more...

Man, you aren't kidding... you've been working hard on getting this thing to shoot.

Post 1 after my last post - not a single argument against any of what you wrote. Especially the first sentence. Mathematically 1,600 fps works out to .00015s for 3" of travel and .00052s for 10" of travel. It takes longer to blink... Until I shoot a hog with whatever load I end up with, I see...

Adding a data point. 2.825" COAL / 1.928 CBTO in my rifle is .036 jump so I could come back another .013" to get .050' jump. I just need to use my comparator to set seating depth instead of COAL. I was kind of surprised that the throat was that short.