Why I Crimp
- Thread starter ButterBean
- Start date
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I thought the same thing, been doing without for over 50 years without any issues and sub MOA groups were never much of an issue. Then had a discussion after Butter Bean's post and decided to give factory crimping on my 300wm a try since it's group sizes were sub MOA but just barely. Loaded up 20 rounds exactly identical, using Nosler Partition 180 gr bullets and trickled IMR 4350 to produce 3050 fps. I did not chronograph the loads since velocity wasn't an issue for me. The two 5 shot groups without the factory crimp averaged 0.75 MOA between them. The crimped rounds using 1/4 turn brought the next two 5 shot groups down to 0.60 average. Not exactly earth shattering, especially for hunting however when shooting competition at 600 or 1000 yards it can mean the difference between a 10 or an X. The X count is for breaking ties. I have lost more than one match by 1 or 2 X counts. Every little bit helps. All my 300WM rounds are now factory crimped and thinking about doing the .270 and 30-06 too when I'm not up to my butt in snow out at the range. Thank you Butter Bean for turning me onto this trick.
You are most welcome
Laguna Freak
Well-Known Member
Not really understanding what benefit you may be attempting to contribute to the readers of this thread with these posts. ???
He's just taking to be talking
milboltnut
Well-Known Member
that it not necessary
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motrapper
Well-Known Member
And Look he Keeps Talking. LOL PGA please
milboltnut
Well-Known Member
oh I hope I didn't loose my creditability here with the experts
QuietTexan
Well-Known Member
So the real reason flame annealing doesn't work is....
Shoot wait, Hammers are magical because....
Got dangit wait, crimping sucks because.....
I can't keep track of all of Bean's terrible, awful, no-good, very bad ideas that don't work
Except on targets that is.
Shoot wait, Hammers are magical because....
Got dangit wait, crimping sucks because.....
I can't keep track of all of Bean's terrible, awful, no-good, very bad ideas that don't work
Except on targets that is.
WildRose
Well-Known Member
I find it very helpful for both especially for my bigger cased magnums. Even factory rounds have been known to "walk" in the magazine.
I do know this, when I firs started paying attention to neck tension after some discussion with beans I started putting a light crimp on all of my ammo and immediately saw enough positive results to justify the extra step which costs me all of probably 20 minutes on a hundred rounds.
WildRose
Well-Known Member
If what you're doing works for you that's all that matters.
Orange Dust
Well-Known Member
Correct. It is only necessary if you are having bullets move in the neck... i.e; recoil, some semi autos etc. You can also tune long range loads without crimping for low ES. Like I said earlier, this is just another thing you can fine tune if you are trying to get the most out of your long range equipment. Nothing more, nothing less.
So the real reason flame annealing doesn't work is....
Shoot wait, Hammers are magical because....
Got dangit wait, crimping sucks because.....
I can't keep track of all of Bean's terrible, awful, no-good, very bad ideas that don't work
Bob Wright
Well-Known Member
You had one bullet "move"? Did you measure it? (Ink doesn't count as a measurement).
If that's OK, keep doing what your doing and scroll on by a solution to that.
