Interesting Results from today chronograph testing

[cwall64]

Got to go out today and take some time from just shooting to test out my reloads with the my brand new CE Pro Chrono Digital with the the USB hookup to the computer.  As expected Longshot performed great, but BE-86 seemed to need a little more to reach the 1,200 fps.  These test shots were all out of a Glock G20 Gen4 with stock components except the RSA was a 22# GlockMiester one.  And I did NOT shoot the chronograph on my first time out with it!!!  Also, the use of a 40x40 tarp allowed me to recover all the brass!!!  The brass used was once fired Underwood.  It was all run through a Redding GR-X die to resize.  COL was between 1.2590" and 1.2610".  Primers where all set with a RCBS hand priming tool.  And powder was dispensed/weighed with a RCBS Chargemaster Combo, then every couple were verified on an old Ohous beam scale.  I really liked the feedback you get from testing with a chronograph, I could tell a small difference in charges, but the chronograph really gives the feedback needed!

Question is Alliant says 8.2 grains is the max load for a JHP, and the Hornady HAPs are just an XTP without the cuts to expand, but the FMJ can go up to 8.5 grains - so, no pressure signs at 8.0 grains, I can go to 8.2 grains - but do I go a little past that or not?  I sure would like to get this powder to at least 1,200 fps.

I think I have the correct image in it now!



Alliant Recipes


Incredible Day in Texas!

[Intercooler]

It looks like you have plenty of space to do anything you want there!

[The_Shadow]

The FMJ bullet will be a shorter bullet being a solid whereas the JHP will be longer given the Hollow Point.
Therefore the pressure will increase somewhat by using the hollow point wit FMJ data...

[cwall64]

Well I upload the wrong image it looks like, there was supposed to be a spreadsheet image!  I'll have to fix it in a couple of hours when I get back home...

[The_Shadow]

One of the things I don't like with the new Alliant data is there is no pressure values to see what they actually measured as shot.

Now with that said, it may be possible to work up to a heavier charge or just seat the bullet deeper at 1.2500" for increasing the pressure some.  BE-86 has alluded me still so I can run some test with it.

[Taterhead]

I'm a little bit of a different duck than some other 10mm enthusiasts.

When I do load workups, I kind of take a long view. When I ask myself, "should I go just a little bit more," I put it into context. I don't think of whether I'd be comfortable shooting a few at a few tenths more powder. I think, "would I feel comfortable shooting 20,000 of these over my lifetime at that increased charge weight?" "Does this leave room for lot-to-lot variations?" So since there is no practical difference between, say, 1150 fps and 1200 fps, I might look at the groups on paper and let that be my guide.

1200 fps with a 180 is doable with a number of powders. If BE-86 isn't quite there, I personally wouldn't sweat it. I'd know that I had a serviceable load with zero concerns about being on the ragged edge, and a load that I could hand to the wife without any nervousness about a KB.

By the way, I have a CE Pro Chrono too, although I don't have the computer hookup. That would be nice. If you every do damage it, contact them directly. They'll make it right for you and you'll never pay more than 1/2 retail to get it replaced. Also, that looks like a nice shooting venue out in Texas!

[cwall64]

It looks like you have plenty of space to do anything you want there!

Yes, my father has around 200 acres, and leases a bunch more...

[cwall64]

Hopefully all can see the spreadsheet image now.  Looks like the web interface has it but Tapatalk on my phone must have cached the old image...

[The_Shadow]

The spreadsheet link or image is not showing...if you need help let me know.
I see you have it as picture format using the img tags to bracket the address just like a photo, but it is not showing a spreadsheet image.

[cwall64]

Well, sorry for that slip up, here are the data points I was referencing...  Doesn't look as good copying and pasting, but works!

Primer   Bullet   Powder   Pwder      Vewlocity Mesaurements               High   Low   Average   Extreme   Standard
   Man, Weight, Typed   Type   Charge (grains)      Shot 1   Shot 2   Shot 3   Shot 4   Shot 5   Velocity   Velocity   Velocity   Spread   Deviation
Federal 150M   Hornady 180gr HAP   Hodgdon Longshot   9.0      1,236   1,219   1,231   1,215   1,214   1,236   1,214   1,223   22   9
Federal 150M   Hornady 180gr HAP   Hodgdon Longshot   9.2      1,212   1,226   1,217   1,203   1,222   1,226   1,203   1,216   23   8
Federal 150M   Hornady 180gr HAP   Hodgdon Longshot   9.4      1,221   1,238   1,233   1,251   1,238   1,251   1,221   1,221   30   19
                                          
Federal 150M   Hornady 180gr HAP   Alliant BE-86   7.4      1,071   1,072   1,084   1,075   1,064   1,084   1,064   1,073   20   7
Federal 150M   Hornady 180gr HAP   Alliant BE-86   7.6      1,108   1,097   1,091   1,095   1,086   1,108   1,086   1,095   22   8
Federal 150M   Hornady 180gr HAP   Alliant BE-86   7.8      1,135   1,134   1,132   1,121   1,125   1,136   1,121   1,129   15   6
Federal 150M   Hornady 180gr HAP   Alliant BE-86   8.0      1,144   1,147   1,159   1,144   1,151   1,159   1,144   1,149   15   6