IPSC Production 9mm...what bullet??

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nerosrevenge

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I am wondering if anyone can provide comments on what bullet to use for IPSC Production division?

I will be shooting an SP-01 Shadow 9mm.

I have picked up a couple of boxes of Remington 147 gr. to get started, but I intend to handload.

Just wanted to know what others are using?

Thanks!

STV.
 
Thank you for the replies.

I am more specifically asking about bullets. Is there a specific advantage to using the 147 gr. over a lighter bullet?

The way I see it a lighter bullet would be preferable as I would be able to achieve the same velocity with a lighter powder charge = less recoil = more accurate.

Yes/No??

STV.
 
Much is subjective. The physics is a net sum equation. At the same power factor, 115gr and 147gr loads produce the same recoil. Most seem to agree that the 147gr bullets have more of a shove than the snap of the 115.

I personally prefer the 147gr bullets, and my K100 eats them like candy.
 
Velocity is not your concern, the PF is. In theory, given equal PF, say 130 with either a light (124gr) or heavy (147gr) the felt recoil would be the same....but it's not.
124 gr bullet needs to be roughly 1050fps to make a 130 Pf, a 147 needs to be going only 885fps..
The 124 gr load will feel crisper in recoil than the 147 gr load. It just depends on how you like the feel. It sounds like you are pretty new to this and your best bet is to buy both and find out what feels good to you.
To be pefectly honest, it probably won't make any tangible difference in your scores. Load up whatever you can find at the store and go have some fun.
 
Hmm...I hadn't considered the power factor since there is no minimum for Major, but I guess I need to be concerned with loading too light so as not to end up in Minor yes?

I will try the 147's that I bought and take it from there.

Thanks so much for the great advice!

STV.
 
Production shoots minor not major.

I would not think there is all that much difference in recoil if both loads are running about the same PF. This is a very subjective subject.

Most 9MM guns have a 1:10 twist which gives the 124 gr bullet the edge in accuracy...in theory at least over the 147gr bullet.

Take Care

Bob
 
Cathy has a new shadow and we have tried both 124's and 147's out of it. definately less "snap" to the 147. She feels that with the 147 the gun comes straight back better while with the 124 there is more twist.

the Physiscs is pretty simple really Kinetic Energy (KE) is the square of the velocity time the bullet weight. so if you are shooting a 124 bullet at 1200 FPS (149 PF) and a 147 1000 FPS (147 pf) the difference in KE is a factor of 40,000. in a 9 mm this usually is felt in more "twist" of the gun.
 
Walter I think the formula for recoil is a little more involved then what you state. The calculation involves the weight of the gun, weight of the powder, weight of the bullet and the velocity achieved and the length of the barrel if I remember correctly....and it hs been a few years since I drove my physics teacher crazy. The heavier bullets seem to provide less recoil than the lighter bullets but the issue is very subjective.

Take Care

Bob
 
Walter Hornby said:
Cathy has a new shadow and we have tried both 124's and 147's out of it. definately less "snap" to the 147. She feels that with the 147 the gun comes straight back better while with the 124 there is more twist.

the Physiscs is pretty simple really Kinetic Energy (KE) is the square of the velocity time the bullet weight. so if you are shooting a 124 bullet at 1200 FPS (149 PF) and a 147 1000 FPS (147 pf) the difference in KE is a factor of 40,000. in a 9 mm this usually is felt in more "twist" of the gun.
Click to expand...

Except we are not worried about KE, we are worried about simple Sir Issac Newton. As the mass of the firearm is fixed, and the desired product of the weight x mass is also fixed, the balance sheet is essentially nil.

The only true difference is subjective, the shooters perception of the recoil impulse.

(OK, the physics geeks will probably note that the one variable not accounted for is the weight of the powder, and there is probably some increase in muzzle thrust with the larger volumes of gas produced by burning larger amounts of slower powder in the lighter bulleted loads.)
 
Lol...well as you can see you'll get a long winded discussion about a lot of stuff that has nothing to do with shooting. As I said, load both up and see what YOU like. Everything else is trivial.
 
Before the matheletes jump in here, let's boil it all down to simple terms. All other things being equal, the real difference between shooting a light bullet and a heavy bullet both loaded to exactly the same power factor is time. The energy transfer with the lighter bullet takes place over a shorter duration than the heavier bullet, so it feels "snappier" in recoil. It's not a question of more or less recoil in one load vs. the other; they are both the same, but the TIME frame is different. Of course, as in all things your mileage may vary.

As PH recommends, just go out and shoot what you have for a while and see how it feels. Someone else will probably have a few rounds of something with a lighter bullet that you can try, and so the process goes....
 
Canuck44 said:
Walter I think the formula for recoil is a little more involved then what you state. The calculation involves the weight of the gun, weight of the powder, weight of the bullet and the velocity achieved and the length of the barrel if I remember correctly....and it hs been a few years since I drove my physics teacher crazy. The heavier bullets seem to provide less recoil than the lighter bullets but the issue is very subjective.

Take Care

Bob
Click to expand...

Bob you are correct but i was trying to keep it simple. KE is simple to explain. if i went into the complete physics, i would bore everyone to tears. the square of the velocity, IMHO, is still the reason for the difference in "felt" recoil.
 
LOL I tried 147 and 124 gr bullets and I still end up last but I have a lot off fun and thats whats its all about:dancingbanana::dancingbanana::dancingbanana:
 
because you still need to meet the threshold of Minor PF.
I shoot a 147gr bullet for a number of reasons, I use less poweder, I like how it feels when my guns go bang, and I find them to be more accurate than other weights. But that's me.
 
is there a certain powder and bullet that will allow me to curve the bullet.LOL
(Angelina did it...LOL)
 
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