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Recoil reduction on 300 RUM

 
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  #1  
Old 11-11-2013, 12:22 PM
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Join Date: Jul 2004
Location: Texas
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Recoil reduction on 300 RUM

I had promised this video a couple of weeks ago and here it is.

After tuning the ports to the max of my calculations, I was very pleased with the outcome.

The last test was the same rifle as in an earlier test the earlier test was with a slightly tuned
Assassin and the last was max. while testing we got over 70% on a 30/378 (No Video).

Enjoy

J E CUSTOM
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  #2  
Old 11-11-2013, 04:55 PM
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Join Date: Feb 2013
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Re: Recoil reduction on 300 RUM

Thanks for taking the time to post the video. Interesting sled.
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  #3  
Old 11-11-2013, 06:41 PM
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Re: Recoil reduction on 300 RUM

Quote:
Originally Posted by MMERSS View Post
Thanks for taking the time to post the video. Interesting sled.
A good friend built the sled. after we looked at all of the ways this was the most accurate and repeatable method we could come up with.

We looked at smooth surfaces and they weren't repeatable.

Next we looked at weights and found that they were not accurate because the rifle had to overcome
the inertia of the weights before it could move and different recoil values could not be predicted.

By using the different springs with a spring rate chart for each combination we could calculate the recoil using standard charts and the device would almost exactly duplicate the numbers. In fact
It reads almost one pound greater than calculated so our numbers are slightly conservative.

It is also extremely repeatable (Very important for comparing results).

The device/sled only has a couple of pounds applied in battery, so the rifle is aloud to start moving instantly .

The name (Recoil Master 3000)started out as a joke but it stuck.

Each time we started a test we first tested a 30/06 with no brake and the same ammo as always
to make sure we had consistent results.

My friend Carl designed and built it, and I give him full credit for a very good test bed.

J E CUSTOM
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Old 11-11-2013, 06:51 PM
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Location: Central MT
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Re: Recoil reduction on 300 RUM

Thanks for the information. Nice to see shop projects put to good use.

Do you have "hurt" indicators on the slide scale? This mark here will hurt a-little, this one more and this one a-lot!
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  #5  
Old 11-11-2013, 08:04 PM
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Re: Recoil reduction on 300 RUM

Quote:
Originally Posted by MMERSS View Post
Thanks for the information. Nice to see shop projects put to good use.

Do you have "hurt" indicators on the slide scale? This mark here will hurt a-little, this one more and this one a-lot!

I would depend on the shooters tolerance to recoil.

I find that the 15 ft/lbs of recoil energy is enough for many.

Then you step up to 20 to 25 ft/lbs for the experienced shooters.

35+ ft/lbs would be the point that recoil would be acceptable to some.

Most people draw the line at anything over 50 ft/lbs.

I my self are in the brain dead group that will tolerate 80 ft/lbs but the fun has gone out of shooting more than 8 or 10 shots.

There is however one group that will shoot up to 100 ft/lbs and swear that it did not hurt.

Everyone has a different level but anyone should be able to handle 12 to14 ft/lbs .

Just my thoughts.

J E CUSTOM
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  #6  
Old 11-12-2013, 04:21 PM
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Join Date: Oct 2005
Location: Fort Morgan, Colorado
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Re: Recoil reduction on 300 RUM

Very Impressive! Is this brake available for purchase? I am currently building a 300rum and I like what I see here! Curious about a price.
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  #7  
Old 11-12-2013, 05:13 PM
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Re: Recoil reduction on 300 RUM

Quote:
Originally Posted by dodgefreak8 View Post
Very Impressive! Is this brake available for purchase? I am currently building a 300rum and I like what I see here! Curious about a price.
Yes . I sent you a PM

J E CUSTOM
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