147 Gr bullet peformance - MP-Pistol Forum

147 Gr bullet peformance

This is a discussion on 147 Gr bullet peformance within the MP Reloading forums, part of the Smith & Wesson MP Forum category; Shooting the Lyman 147 gr bullet out of my M&P FS and Pro 9MM is giving me fits. The bullet won't stabilize. At 10 yards ...


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Old April 13th, 2013, 07:03 AM   #1
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147 Gr bullet peformance

Shooting the Lyman 147 gr bullet out of my M&P FS and Pro 9MM is giving me fits. The bullet won't stabilize. At 10 yards they show signs of tumbling and at 15 yards they are going through targets sideways. These same cartridges out of my CZ., STI and Tanfoglios run just fine. The latter three guns all have 1 - 10 rifling while my M&P's run 1 - 18.

I size the bullets .357 and use a soft commercial lube.

The M&P's shoot the 125 gr bullets just fine no issues and accuracy is very good.

Is this just a case of the M&P's having to slow a rifling twist?

I have heard the new M&P's were getting a 1 - 10 twist but have been unable to confirm.

Take Care

Bob
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Old April 13th, 2013, 08:11 AM   #2
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I'm not a reloader, but in my mp 9c, my ammo of choice in factory loads are
147 gr. my groups are very tight, just a little high for quick pick up on second shot.
Used 147 gr wwb for my ccw test and my NRA instructors test, 20 hits inside
a 9" paper plate at 45' . Nice small holes, no key holes.
When or if ammo comes back I will buy a case of 147. recoil is more of a push with very little snap. Love the 147, but all this does not help your problem.
Very smart people on this forum and they will help you !!
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Old April 13th, 2013, 09:36 AM   #3
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Not shooting the same cast bullet you are but the Missouri Bullet Co. 147 grain lead bullets I'm using shoot great in my full size M&P. No sure what the twist rate is on it though.
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Old April 14th, 2013, 04:10 PM   #4
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Quote:
Originally Posted by M1A4ME View Post
Not shooting the same cast bullet you are but the Missouri Bullet Co. 147 grain lead bullets I'm using shoot great in my full size M&P. No sure what the twist rate is on it though.
What velocity are you running your bullets at? If you don't mind let me know what powder you are using as well.

Take Care

Bob
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Old April 16th, 2013, 07:27 PM   #5
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Just loaded up some 147 Rainer bullets w/ some Titegroup powder. Should be around 855fps. We'll see how they shoot in a day or two. Will be trying them in a 9mm Pro. Hoping it will be a viable load for 3 gun competition.
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Old April 24th, 2013, 07:25 PM   #6
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147 Gr bullet peformance

What powder? What OAL?

I run Falcon Hardcast 147s at 1.145 with 3.5gr of 231 and have zero issues ( well not after I got a slightly taller front sight to adjust for the POI)

I have also used WSF and Unique with them and gotten good results.

I have used various plated 147s with TG and hated it. I guess I'm weird.
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Old April 25th, 2013, 10:08 AM   #7
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I read something about a lot of the manufacturers are changing the twist rate on the 9mm, I can't remember which way it was going, just that they were changing to a twist that has become recognized as better able to stabilize more bullet weights. Interesting that Storm Lake still sells their aftermarket barrels with the old twist, when virtually the entire rest of the market has changed over.
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Old November 4th, 2013, 03:53 AM   #8
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147 gr

I am thinking of reloading 147 LTC 9mm for use in my CCW pistols.
Shield, XDs, PPS. Any thoughts on if 147 will work with CCW pistols?
I plan on using TG. Thank you
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Old November 6th, 2013, 02:40 PM   #9
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Originally Posted by Canuck44 View Post
What velocity are you running your bullets at? If you don't mind let me know what powder you are using as well.

Take Care

Bob
I'm so sorry I missed your question about the load.

These seem safe in my gun and function with no issues (XDM and M&P full size guns and my compact XDM) and are as accurate at factory fmj ammo.

I consulted my logbook and saw that I've used AA#5 powder at 5.3 grains and 700X at 3.4 grains. I only started experimenting with the 700X recently as I had some and figured I'd try to use it up instead of using up my AA#5. The AA#5 meters so much better from my RCBS powder measure vs. the 700X but I need to use the 700X up.

What are those things people put in reloading posts? Safe in my gun but work up your own loads and be sure you reload safely. Or something like that.
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Old November 6th, 2013, 03:48 PM   #10
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The older barrels have a 1:18.75 twist.
Newer barrels (marked w/ 1 or 2 dimples) have a 1:10 twist.

Last edited by mrnak; November 6th, 2013 at 03:52 PM.
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Old November 17th, 2013, 07:26 AM   #11
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Where are the dimples located?
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Old November 17th, 2013, 07:39 AM   #12
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Where are the dimples located?
On the underside of the chamber.
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Old August 11th, 2015, 12:36 PM   #13
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Shooting 147 gr LRN out of M&P Core (1:10) using 3.7 WSF good groups (3") at 25 yds. "Heavy bullets, slower powder, faster twist", "Lighter bullets, faster powder, slower twist".
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Old August 11th, 2015, 02:50 PM   #14
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In my new M&P Ported 9mm the Twist is 1-10.
The gun is new and oI shoot a 130g S&W on 5/2015

I shoot a 130g Berry's Plated with 4g of Clay Dot Not a problem

Redstone
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Old August 11th, 2015, 09:32 PM   #15
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I dont shoot straight lead, but from what I am thinking and what I am seeing, the bullet is supposed to be .355, I am wondering if your resizing them to the wrong dimension...

https://en.wikipedia.org/wiki/9%C3%9719mm_Parabellum
9mm 115gr FMJ Reloading Bullets

I mostly shoot 40, but the few 9mm Berrys Ive shot were amazing, also at .355.

Another possibility, the hardness of your lead, or a combination of hardness and diameter... Maybe switch bullets for a few hundred rounds and see what happens.

As far as lube goes, its mostly to "prevent" leading, I dont think (though Im subject to correction) the lube will effect accuracy, I cant see it making a bullet keyhole at 15 yards.

Do you know what velocity your loads are running? A velocimeter is a great tool for reloaders!! I suspect a final possibility, the bullet is not getting enough velocity to stabilize. Can you post a picture of a keyholed target?

I doubt its your weapon, seriously... Id scratch that off my worry list.

Let us know how things turn out, should be a simple fix...
EB

Last edited by ElevenBravo; August 11th, 2015 at 09:36 PM.
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