Post by: JJD on February 19, 2015, 08:08:37 AM
Just wondered how it effected performance and pressure?
I am running some pretty hot loads through my 300 win mag. Although I have noted no bullet movement as a result of recoil thus far, I figure it can happen.
Post by: haulinbass on February 19, 2015, 08:26:35 AM
Post by: 2labs on February 19, 2015, 02:21:18 PM
Post by: iusmc2002 on February 19, 2015, 02:48:59 PM
Post by: grundy53 on February 19, 2015, 02:54:37 PM
Post by: carpsniperg2 on February 19, 2015, 03:48:53 PM
Post by: BULLBLASTER on February 19, 2015, 03:54:09 PM
Post by: Jason on February 19, 2015, 06:57:25 PM
Post by: JJD on February 20, 2015, 08:10:33 AM
Next time I can get out;
I will load a magazine full of cartridges that have not been crimped, fire 1, pull the rest and measure the bullet seated depth with a comparator.
I will repeat the process till all rounds are fired, Last round will have been subject to 3 previous rounds fired above it.
This should be a positive test for movement.
Will also measure/look for signs of increased case pressure and change in point of bullet impact and group size.
note;
I use a Lee Collet sizing die that I have taken .001 off of the collet in order to maintain a slightly tighter fit.
I understand that just because a bullet does or doesn't move in my reloads does not mean it will be the same for everyone's loads.
Just food for thought.
Post by: Blacklab on February 23, 2015, 06:34:14 PM
Post by: Spawnstar on February 23, 2015, 07:55:35 PM
Post by: magnumb on April 05, 2015, 11:12:14 AM
The only calibers I crimp is auto loaders lever guns and revolvers.
:yeah:.............I don't even consider crimping my 300 RUM and there's a bit of recoil/pressures goin' on with that rather warm load. After 3 rounds, measurements of AOL on the 4th cartridge have shown no appreciable difference in length.
Post by: HawkCreek on April 05, 2015, 11:33:35 AM
As an interesting aside a light crimp moved my POI about 3/4" (maybe a little less) at 100 yards.
Post by: dawei on April 05, 2015, 11:42:41 AM
7/30 Waters
30/30 Winchester®
444 Marlin®
I do not crimp for my...
7mm Remington® Magnum
30/06 Springfield®
Post by: JJD on April 05, 2015, 01:01:22 PM
Next going to experiment with consistancy with the Lee Factory crimp die.
Can't imagine it will be any better, but ya never know till ya give it a shot. Yeah, it was intended :sry:
Post by: Stein on April 05, 2015, 01:59:22 PM
Post by: yorketransport on April 05, 2015, 06:50:39 PM
All revolver and semi auto pistol ammo gets a crimp. I've had plenty of magnum revolver loads jump crimp by the time you get to the last round in the cylinder. It helps give a more consistent burn with slow pistol powders as well.
Andrew
Post by: magnumb on April 05, 2015, 07:09:07 PM
All revolver and semi auto pistol ammo gets a crimp. I've had plenty of magnum revolver loads jump crimp by the time you get to the last round in the cylinder. It helps give a more consistent burn with slow pistol powders as well.
Andrew
:yeah:..........................my .44 Mag load is rather warm. I load Beartooth 300gr. WFNHCGC bullets and I use a heavy crimp....nothing out of the ordinary. No creep, at all, but I did pay special attention to setting this crimp perfectly and securely as it is my day packin' woods gun and needs to be as foolproof as possible.
I always check the last round in my revolvers handloads and factory loads, as well, after I shoot the rest of the cylinder to see if there's been any bullet creep. Factory or home grown..........makes no difference, they both get the same quality control once over.
Post by: Bill W on April 05, 2015, 07:32:19 PM
Post by: magnumb on April 05, 2015, 11:29:53 PM
I crimp revolver ammo and also shotgun shells.
Never a bad idea......... :)
Post by: C-Money on April 06, 2015, 07:03:20 AM
Post by: aorams on April 06, 2015, 08:08:35 AM
Thank you in advance
Post by: aorams on April 06, 2015, 08:23:17 AM
Thanks angain.
Post by: Curly on April 06, 2015, 08:26:30 AM
Post by: aorams on April 06, 2015, 08:48:25 AM
Post by: JJD on April 06, 2015, 08:56:42 AM
When they speak of primer flattening, the primer face fills in the beveled edges around the primer pocket as the primer backs out and is pushed up against the bolt face.
Something that will often accompany that condition is the pocket in the fired primer, where the pin struck the primer, will have raised edges where the primer metal tries to back into the firing pin hole in the bolt face.
Sure hope that made sense.
Can someone post a photo of a flattened primer? I'll look around if no one has one handy.
Post by: magnumb on April 06, 2015, 08:57:35 AM
If excessive pressure's were occuring, every bit of space visible around the outside of the primer in the primer pocket itself, would be covered by the flattened primer. Excessive pressure would actually make the base of the primer 'flow' and take up almost, if not all, of the primer pocket area.
That load and your pictures would give me no reason for concern.
Smart to ask the questions and offer the pictures that you did. As a newer handloader, you've taken the most prudent approach possible....good for you.. :tup:.
Post by: JJD on April 06, 2015, 09:19:03 AM
Post by: C-Money on April 06, 2015, 09:59:51 AM
Post by: stevemiller on April 06, 2015, 10:50:56 AM
Post by: stevemiller on April 06, 2015, 11:23:53 AM
Post by: 2labs on April 06, 2015, 11:26:18 AM
Post by: stevemiller on April 06, 2015, 11:37:10 AM
Post by: aorams on April 06, 2015, 03:31:43 PM
Again thank you for taking the time, I hope to be able to return the favor.
I hope you can enjoy the attached short video
Post by: stevemiller on April 06, 2015, 04:07:04 PM
Post by: JJD on April 07, 2015, 05:22:18 AM
Nice photo of cratering.