Author Topic: 115gr vs 124gr vs 147gr felt recoil  (Read 34137 times)

0 Members and 1 Guest are viewing this topic.

Offline Smitty79

  • Hero Member
  • *****
  • Posts: 1288
  • So many guns, so little time
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #45 on: September 06, 2014, 05:06:28 PM »
I as able to stop the video with the bullet about an inch out the barrel of the gun.    At that point, I think the slide has moved about a millimeter.
Gas contributes to the felt recoil.   All other things being equal, more gas is more recoil.   But things aren't equal.   Different powders get different pressures for the same charge weight.    This comes from the amount of gas liberated and how "hot" the gas is.
Don't mistake my high post count for knowledge or wisdom.   I just like hearing myself type.

Offline Riptide439

  • Hero Member
  • *****
  • Posts: 3648
  • Meet Riptide of Chincoteague
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #46 on: September 06, 2014, 06:29:22 PM »

So if this is true, then what happens when you have two loads at the same powder factor with the SAME bullet weight, but one using 3.7 grains of powder A and one using 4.3 grains of powder B?  The 3.7 grains is a max load at 32,500 CUP and the 4.3 grain load is a starting load at 28,900 CUP?  Will the 4.3 grain load recoil more even though less pressure is generated?

So you are really going to make me think at 6pm after I just got back from work! Ooof.  :o

I may be wrong but 2 different powders cause variables. But, to me, pressure is a spike in expanding gas.
Powder A may be fast burning and spike with the bullet only 1/2 way down the barrel.
Powder B may be slower with highest pressure as the bullet exits the barrel.

With fast powder A, pressure would decrease as the bullet exits the barrel.
With slower powder B, the preassure would be more steady causing more felt recoil since powder burns slower expanding the gas at a more steady pace.
If I imagine a bell curve with the 2 powders, powder B would have a longer, more steady decrease vs. the sharp up and down of Powder A.

OK - thats enough. My beain hurts. Bourbon Time.  :)
75B 9mm Duel Tone * SP01 Shadow * SP01 Phantom * SP01 Tactical * 85 Combat * 2075 Rami * P-09 * P07 * 97BD Cajunized * P01
S&W 686-6 * Dan Wesson Valor .45 * SAR K2 .45 * Canick S120 9mm * Sig P226
452 Trainer * 452 Ultra Lux  x 2 * 452 Varmint Thumbhole*527 .223 Carbine*Rem 870 Express

Offline Smitty79

  • Hero Member
  • *****
  • Posts: 1288
  • So many guns, so little time
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #47 on: September 06, 2014, 07:22:52 PM »
I agree with the Bourbon.   I am trying to decide between Buffalo Trace and Woodford Reserve.

Gas amount and the heat given off from the powder burning both drive pressure.   Lots of gas at low temp is the same as less gas at high temp.

Pressure= C (Temp)*(Amount of Gas)/(Volume).   C is a constant.   Don't worry about it.   For the same barrel, the volume is the same.
Don't mistake my high post count for knowledge or wisdom.   I just like hearing myself type.

Offline Riptide439

  • Hero Member
  • *****
  • Posts: 3648
  • Meet Riptide of Chincoteague
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #48 on: September 06, 2014, 07:38:38 PM »
I agree with the Bourbon.   I am trying to decide between Buffalo Trace and Woodford Reserve.

Gas amount and the heat given off from the powder burning both drive pressure.   Lots of gas at low temp is the same as less gas at high temp.

Pressure= C (Temp)*(Amount of Gas)/(Volume).   C is a constant.   Don't worry about it.   For the same barrel, the volume is the same.

Good Bourbon Choices! Having Makers 46 myself tonight.
So are you guys going to learn me physics?  :o
75B 9mm Duel Tone * SP01 Shadow * SP01 Phantom * SP01 Tactical * 85 Combat * 2075 Rami * P-09 * P07 * 97BD Cajunized * P01
S&W 686-6 * Dan Wesson Valor .45 * SAR K2 .45 * Canick S120 9mm * Sig P226
452 Trainer * 452 Ultra Lux  x 2 * 452 Varmint Thumbhole*527 .223 Carbine*Rem 870 Express

Offline Smitty79

  • Hero Member
  • *****
  • Posts: 1288
  • So many guns, so little time
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #49 on: September 06, 2014, 08:34:12 PM »
Good Bourbon Choices! Having Makers 46 myself tonight.
So are you guys going to learn me physics?  :o

When I get to 60, a little over 2 years, I am planning to teach Physics at one of the local Junior Colleges.   If you move to Portland Oregon, I am all yours.
Don't mistake my high post count for knowledge or wisdom.   I just like hearing myself type.

Offline 1SOW

  • Hero Member
  • *****
  • Posts: 15006
  • GO GREEN - Recycle 9MM
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #50 on: September 06, 2014, 09:15:05 PM »
I remember being 60 AND being allowed to drink bourbon or better yet Canadian whiskey.
Now it's limited to just "White semi-dry" wines,  but seldom pass up an opportunity.

If the same two bullets  with two different powders leave the bbl at the same speed,  they had the same pressures pushing them.  The acceleration rate may have been minutely different,  but the result at the muzzle was the same.  With "EITHER" of those same powders,  more powder = more recoil regardless of the bullet used.

 

Offline painter

  • Hero Member
  • *****
  • Posts: 6231
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #51 on: September 06, 2014, 09:23:47 PM »
I'm just glad the conversation has switched to something I can understand... ;D
I had the right to remain silent...

but not the ability.

Offline 1SOW

  • Hero Member
  • *****
  • Posts: 15006
  • GO GREEN - Recycle 9MM
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #52 on: September 06, 2014, 09:40:36 PM »
Note the last shot of the semi.  Pay close attention to 4th shot zoomed in on the muzzle & blast and when recoil starts.
Resting the pistol on the dowell was a good method to show flip/recoil.
http://www.trippresearch.com/tech/video.html
« Last Edit: September 07, 2014, 12:24:27 AM by 1SOW »

Offline IDescribe

  • Hero Member
  • *****
  • Posts: 4049
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #53 on: September 06, 2014, 10:21:17 PM »
And the correct answer is...

Buffalo Trace

Offline 1SOW

  • Hero Member
  • *****
  • Posts: 15006
  • GO GREEN - Recycle 9MM
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #54 on: September 07, 2014, 12:30:35 AM »
 ;D

James that was a geat video with both the pistol shot and the bullet impact.   Like.


bonj

  • Guest
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #55 on: May 01, 2019, 05:04:10 PM »
115 vs 124 grain?  I'd be surprised if a half of a gram difference would make any difference at all.

Offline Wobbly

  • Administrator
  • Hero Member
  • *****
  • Posts: 12784
  • Loves the smell of VihtaVuori in the morning !
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #56 on: May 02, 2019, 09:17:21 AM »
I'm just glad the conversation has switched to something I can understand... ;D

Yeah ! Two shots and your neighborhood starts to look a lot better.

They call it "Bourbon Renewal".   O0
In God we trust; On 'Starting Load' we rely.

Offline painter

  • Hero Member
  • *****
  • Posts: 6231
Re: 115gr vs 124gr vs 147gr felt recoil
« Reply #57 on: May 02, 2019, 08:23:31 PM »
I'm just glad the conversation has switched to something I can understand... ;D

Yeah ! Two shots and your neighborhood starts to look a lot better.

They call it "Bourbon Renewal".   O0
It's five years down the road...

I've switched.

Come up with something that rhymes with V. :-*
I had the right to remain silent...

but not the ability.