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223 16" AR15 4000+fps 53gr TSX

Rock Knocker;

I bought my P/U truck at Buffalo Ford. I live ~ 20 miles south of you. If you want to come to the local range (Minnetonka Sportsmen) as my guest, I'd be willing to set up my LabRadar and snap some velocities for you.

BTW, thanks for reducing the coyote population around here. If I could legally shoot from my property, I could pick them off easily in the field below me..

Hoot
 
Ballistic trajectories being a parabolic curve; two points of measure are not enough to define the curve; velocity can be measured by drop; but I'd recommend getting at least 5 points (different distances) to be sure, and BC is an assumed average value, which makes the calculation error prone to start.

Careful sight to bore distance is needed as well.

-Mac
 
Hoot said:
Rock Knocker;

I bought my P/U truck at Buffalo Ford. I live ~ 20 miles south of you. If you want to come to the local range (Minnetonka Sportsmen) as my guest, I'd be willing to set up my LabRadar and snap some velocities for you.

BTW, thanks for reducing the coyote population around here. If I could legally shoot from my property, I could pick them off easily in the field below me..

Hoot
Click to expand...
Hey Hoot I would love to take up on that offer, feel free to PM me to set something up, I've got very flexible hours in the winter.

I've got 300 50gr vmax lubed up and ready to test I can throw together a load for them by tomorrow night. I dont have a large supply of TSX and who knows when I will find more so i would like to test more bullets with HBN, I've got a couple more 65gr SGK lubed up shooting a full case of benchmark that would be great to see also.

I know it sounds crazy but I was shooting 26.4gr 53 TSX no HBN last winter with 8.5 to 9 inches of drop, this winter with HBN and 26.9gr H322 im getting less than 5 inches of drop at 300. And in testing I fired a TSX through 10 or 12 inches of oak log, I havent seen something penetrate that much wood since the cheap russian steel core ammo.

And sorry for the 300 yard and 270 yard confusion, I just moved across the state and need to find a new range. I can only shoot 100yards at my place unless I clear a section of forest and build a raised platform to shoot over terrain so I got out and fired a few test shots at longer range when and where I could. Laying in the snow resting the gun on ice and a rolled up gun case.

P.S. I worked this load up slowly over months with plenty of protection, I wouldnt advise anyone to start with what I posted. And I've thoroughly grenaded an upper before, it was very mild and turns out something scarier happens every time i shoe a horse.
 
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The OP’s load is 15% over the listed Hodgdon maximum, yet he says it gives at least 30% higher velocity. He says the load is safe, yet he’s grenaded an upper before. I wonder how he works up a safe load. And he seems nonplussed about the blow up rifle.....

I’m sure the OP is being sincere, just perhaps misguided a bit. I really want to see chrono results - not to prove him wrong, but to see the facts. Who knows what will happen...

.
 
Ditto aggrigate I want to see facts also, this is the way I have measured velocity for the last 12 years.

The exploded upper had to do with me and my buddy loading on the same equipment when we started out... too many cooks in the kitchen, longshot got mixed with H335 in the powder measure. It was no big deal, I'm more worried about teenage drivers.

And I've been shooting a couple BHW barrels most that 12 years also and poly twist has nothing to do with published data.
 
I made this post to get a hold of other poly twist shooters... I've talked to others on different sites and everyone sticks to published data, I talked to one person shooting poly twist that had tried HBN but they never changed their load they just added HBN to see what would happen.
 
Just a suggestion... is there any chance the bbl manufacturer has done any testing?

Maybe they are worth tracking down and asking?
Strain gage pressure tests are not expensive compared to being a bbl manufacturer, so maybe they have run some safety margin tests?
Just a thought in case it reduces the risks for a catastrophic failure.
 
I've watched a lot of primers CCI450s show little flattening, minor swipe on some cold bore shots and ejection pattern on par with other heavier loads.
 
These are some of the cases from a small batch of 26.9gr loads, I market around the primers with sharpie because my recklessness has some bounds as you might say. The light helps accentuate some cratering but that shows on mediums range loads also. I've seen some high pressure cases before and these dont look too bad, not something I would want in a plinking load but for a few TSX loads for science sake...
50849756961_774b56934e_c.jpg
 
It must be pretty cold to be shooting 2 grains over my loads.

Just saying bro, if forum boss sees this post...

Just sayin...
 
Rock Knocker said:
These are some of the cases from a small batch of 26.9gr loads, I market around the primers with sharpie because my recklessness has some bounds as you might say. The light helps accentuate some cratering but that shows on mediums range loads also. I've seen some high pressure cases before and these dont look too bad, not something I would want in a plinking load but for a few TSX loads for science sake...
50849756961_774b56934e_c.jpg
Click to expand...


You've mentioned HBN, am I correct, you're coating the bullets? That would answer more than a few questions.

Be Safe and keep us posted on the chrono results.

-Mac
 
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