Rainge Day

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And a minor mystery resolved.

Finished cleanup from yesterday’s projects, loaded the car and, as soon as I backed out of the garage, it poured. Well, that rarely stops me. Got to the range and half a dozen peeps were there, merrily emptying AR mags into the rain. I started setting up and, as happens once in a while, my Range Box with suppressors and Garmin Chrono were back at the house. All good, shot the breeze with my buds.

I came back later in the day, properly equipped, and shot the latest ladder:

Got a winner on the second rung at .238”! Three shots, one ragged hole.

But what the heck after that? All over the place and velocity very inconsistent. I shot a known load at the center and it landed down 5.5” at 7 o’clock. Da Fuq? Started checking for loose stuff and, damn, the can was 2 clicks loose. Tightened it, fired another known load at center and it landed properly. I think the can loosened on the second shot, upper right. First shot good, then things started dropping down and spraying. Makes sense – if the can was at all loose, the end would drop and bullets would either strike a baffle or the end cap, and hit low and slow and all over the place.

Easy to figure out after the fact. I guess I’ll redo the ladder starting from the great second rung and see what happens. That’s the fun of this game, and I already found a great 120 g load!

Ladder Load Tests Are Fun

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And lets you shoot a lot, to boot.
First one got us some info – our loads are a couple hundred FPS slower than the book. It also showed us the upper end appeared to be tightening up. With that info, I did a .2 grain ladder test, starting at the last top end. So,

Yep, group gets tighter as it gets faster. Next, another .2 grain test, starting at this upper end. Since we are getting close to a compressed load, I’ll only do 3 rounds of each. Just in case I see pressure signs, need to stop, and then unload some rounds.

Tomorrow looks like a good day. With last night’s thunderstorm, I think we’ve broken the back of the hazy, hot, humid summer days. I worked outside today rebuilding porch steps, and barely broke a sweat. And now I’m sitting in my yard, overlooking the pond, and it is cool enough to keep the bugs away. I love northern NH.

Working up a load.

RI RedLeave a comment

Yeah, that sounds sort of sus.

I have 3-4 lbs of Accurate 4350 powder. Different from Hodgdon 4350. My experience in the past is that the Accurate is definitely slower than the Hodgdon.

I also have a bunch of 6.5 Creedmoor 120 grain bullets from the time I spent figuring out my Ruger shot 140s best.

(Umm, the 0 means right on the bullet weight; the + or – means .2 grains off spec. Yes, I’m a nerd.) What to do? Load test of course.

You always start with the book. No need to reinvent the wheel.

We’ll go right by the book – 40.4 g to 43.3 – and see what we get.

Well, then. There are some possibilities. But MV is much lower than the book. Top end should be 2900; I’m only getting 2695. Between shorter barrel than the book, and lots of rounds through the rifle, it looks like I can load hotter than the book.

Tomorrow, we’ll do a .2 grain ladder test and see what we get.

Biggest Boolets for Beginners

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Anything beyond these you have to enlist to get.

Yesterday we looked at that deadly midget of a round, the .223/5.56. Today let’s do a comparison with some bigger league stuff, true “high-powered” rifles. We’ll see a few more boollet types as well.

Left to right: .223/5.56 FMJ; .243 Winchester JHPBT (new – Jacketed Hollow Point Ballistic Tip); 6.5 Creedmoor JHPBT; .30 – ‘30 JSP (Jacketed Soft Point); .308 FMJ OT (Open Tip), and .30 – ‘06 FMJOT.

You can see that the itty bitty .223/5.56 is dwarfed by all the others. .30 – ‘06 was the standard American infantry round for WW I, WW II and Korea. In 1957, the 7.62 NATO/.308 was adopted by the US, first as a true assault rifle (select fire between semi and full auto) in the M-14, then as a designated marksman round. Vietnam introduced the M-16, shooting the 5.56 NATO, also select fire.

One last comparison:

.30 – ‘06 JHPOT, 30 – ‘06 M25 (Tracer), and .50 BMG (Browning Machine Gun). No, I don’t shoot .50 BMG, so I don’t have a bullet to show you. Dammit.

That’s it for Beginner Boolet Basics. Now, go shoot some of them!