The sliding collet on what? Tribb
Why I Crimp
- Thread starter ButterBean
- Start date
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It was a couple of years ago that ButterBean and I discussed whether to crimp or not. I was working up loads for the Tikka 270 at the time and without any crimp was able to get 0.070 to 0.075 groups. Got a Lee Crimp Die and gave it a try with just a light factory style crimp. Group size dropped down to 0.55 to 0.60. Have been lightly crimping everything since, 223, 270, 30 and now 338 with fantastic results.
RegionRat
Well-Known Member
Teri Anne, I'm pretty sure I follow your drift, but it looks like the zeros slipped on the 0.070 to 0.075?
It makes more sense if that was really 0.70 to 0.75 such that it improved with 0.55 to 0.60.
They can be "Tuned" if needed, I'm set up to do that if need be
I'm just glad you had an open mind and tried it, so many on here are not
Roger that thank you
You are absolutely correct, sometimes those zeros have a tendency of getting out of control late at night when one should be in bed sleeping instead of trying to stay awake to read, "just one last post."
RichCoyle
Well-Known Member
I'm and small increments. Therefore, I didn't choose 8th turn but rather 16th turns on the die. At 7/16 turn the groups all of a sudden shrank. It was like the rifle was waiting to show me it's best potential.
nicholasjohn
Well-Known Member
Thanks for the explanation. It may be that the pressure signs that signaled max to me were due to this spike, and I might have backed off from a point that wasn't really maximum in my rifle. This makes sense to me, since I may have more complete ignition with the crimp before the bullet engages the lands. This would probably eliminate the pressure spike. When I try the crimp it's quite likely that I'll find that I can keep advancing my powder charge for a slightly higher velocity that is closer to true maximum.
quigley257
Well-Known Member
By removing a small amount of the part of the crimp die that contacts the shell holder, you can effectively tweak how far down the case neck the crimp occurs. From the factory, I find many of the LFC dies crimp right on the very edge of a case that's trimmed to minimum spec. I prefer them to "get ahold" of a bit more of the case neck.
OrionsStar
Well-Known Member
- Joined
- Jul 2, 2012
- Messages
- 179
ButterBean helped me out in a massive way on a 6.5sst build and I found it works well. I now crimp everything I load Hammers in. It's worth the investment in my opinion. I have a 6.5ss and need to get a LFCD for it and modify it to work I hope. Do any of you know what LFCD may work for this?
I look into it
FLShooter293
Well-Known Member
Shout out to Butter Bean. I used to get 1/2" groups with Badlands BD2s, but with BL shut down decided to switch to the Hammer 154 HHTs (pink tips!!) in 300 WSM for NM elk hunt. Good groups but nothing spectacular until I ran into this thread. Bought a FCD and set it up the Butter Bean way and ended up about a 1/4 turn. I think I didn't snug the die down on the bullet enough when setting up so I believe it's actually an 1/8 turn.
ADG brass
Hammer 154 HHT
Fed GM215M
62.5 grs. Varget
3105 muzzle velocity with an ES of 12 from an 18" Proof barrel
I'm sold on the FCD and just ordered on for my .308 Win
ADG brass
Hammer 154 HHT
Fed GM215M
62.5 grs. Varget
3105 muzzle velocity with an ES of 12 from an 18" Proof barrel
I'm sold on the FCD and just ordered on for my .308 Win
