Ballistic gelatin test results : 30-30WIN LeverEvolution


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Brass Fetcher
May 12, 2006, 11:18 AM
160 grain Hornady Evolution bullet

Block calibrated at 9.8cm and 616 ft/sec impact velocity

Bullet impacted at 2216 ft/sec

Penetration 17.8"

Average recovered diameter 0.634"

Firearm was lever-actuated with 20" barrel

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ID_shooting
May 12, 2006, 12:12 PM
How does this compare with standard flat-nose 30-30 bullets?

Grendelizer
May 12, 2006, 02:34 PM
JE223, slightly off-topic, but would you mind sharing your gelatin brand and "recipe"? We recently had some gel-testing done on the 6.5 Grendel and even the professionally-prepared gelatin wasn't as clear as it could have been. Could have been the water; could have been the gelatin brand.

For my own amateur use at home in the future, I'd like to know your brand and your "recipe" and any other tips and tricks you'd like to pass along. Thanks.

John

Brass Fetcher
May 12, 2006, 03:00 PM
Sure. I use Vyse brand ordinance gelatin and follow Shawn Dodsons procedure at www.firearmstactical.com . I bet there would be many people here interested in your 6.5 Grendel results, myself included.

Gelatin is actually pretty simple to make (at least it is now after two years of doing it ;) ). Basically, I used to follow the above procedure to the 't' but have modified it recently in the interests of saving time. What matters is that the block calibration information is recorded and the block has been given enough cooling down time to reach a complete cure, so whatever gets the block there is just as good as anything else.

I generally now skip the '4 hour hydration period' - after the solution is poured into the mould, I place it immediately in the fridge. To help speed cure time, I elevate the mould off of the refrigerator surface (using two pieces of 0.50" square tubing, the higher the better) to let the colder air circulate under the mould and also place the mould in the stream of colder air being blown by the refrigeration unit.

Please look for blueprints of an aluminum mould with integral cooling fins in the near future - I am looking to reduce the cure time significantly by increasing the effects of the free convection. They will be put up on THR when I get them done.

Oh, I use 10% gelatin powder concentration - 20% is for rich people. ;)

JE223

Grendelizer
May 12, 2006, 03:20 PM
Which mould do you use? One source said to simply use plastic "Tupperware-style" bins of the correct size, but to line first with plastic wrap for ease of gel removal.

John

P.S. I had posted 6.5 Grendel gel test results on my website, www.65grendel.com, but I will also post them here.

only1asterisk
May 12, 2006, 03:22 PM
What distance did you measure velocity at?

David

Cosmoline
May 12, 2006, 03:27 PM
Great info!

Just for comparison here's a drawing showing the classic results from a 170 grain .30-30 (that's about 17 inches of penetration)

http://pages.zdnet.com/remingtonsniper/sitebuildercontent/sitebuilderpictures/3030.jpg

NineseveN
May 12, 2006, 03:54 PM
Must resist temptation to make my own gel...too, much, fun could...be...hhhhaaa...had. :evil:

only1asterisk
May 12, 2006, 04:01 PM
There is NO fun in gelatin test prep, just work. The shooting stuff part is still fun, but then you have to clean up.

Who am I kidding, I wish it were my fulltime job!

David

Freddymac
May 12, 2006, 04:18 PM
I've never done this, so i don't know if it will work. Have you ever tried using a small fan, like a little desk fan, in the fridge. Go to the hardware store and get one of thoselight bulb socket to electric plug screw in adapters so that you could plug it in, inside the fridge.

Just a thought, lilke I said, I've never tried this

Brass Fetcher
May 13, 2006, 03:56 PM
Freddymac - thanks for the suggestion. That is something that I thought that I would do to determine whether or not the new mould would be worth it. Fans cool by increasing the rate of convective heat transfer - so it would cheaply simulate fins. But, I'm also sometimes of the school of thought that says 'if it seems right, build it and see what happens' , sometimes, I've found that is the only way to do it. :)

NineseveN - you should do it - it is awesome. And the results you get for your guns/ammo will be more valid than comparisons with anyone elses results.

Cosmoline - nice pic, thanks.

only1asterisk - The velocity was measured five feet from the muzzle.

Grendelizer - Hey thanks for those 6.5mm pictures. Very nice. Who did you say you test/work for again? I had a stainless steel mould made to 16"x6"x6" exterior dimensions. They utilized something like 12 gauge sheet and welded it into a box shape.

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