Exesive pressure from to much crimping !

[Mickal]

I reload 5 groups from min to max. To try V-max 55 gr. In my 22-250.

At shooting, the first group was loud , but at the 2 group the 3 shot the bolt was very hard to open and the shell base show pressure sign.

I go back home and put the shells into the bullet puller, take alot of knocking to disloge the bullets , even one will not come out.

I surely put to much crimping playing with the setting of the crimping tool.

NOW, i reload the same shell that was over crimping, but really not satisfy with the grouping, could it be the reason or my gun does not take v-max with my powder.

should i try a new batch with minimum crimping to sée if better?

Mickal

 

[Homerange]

No need to crimp rounds for a bolt gun.

 

[Dub]

crimping for a bolt gun is bad juju

 

[Mickal]

I use the lee factory crimp

 

[Pawnee Bill]

I use the lee factory crimp

Still bad juju.

 

[Mickal]

And if i add a Lee collet neck sizer.

It is to carry for hunting.

Still a bad juju

Mickal

 

[Webster]

I reload 5 groups from min to max. To try V-max 55 gr. In my 22-250.

At shooting, the first group was loud , but at the 2 group the 3 shot the bolt was very hard to open and the shell base show pressure sign.

I go back home and put the shells into the bullet puller, take alot of knocking to disloge the bullets , even one will not come out.

I surely put to much crimping playing with the setting of the crimping tool.

NOW, i reload the same shell that was over crimping, but really not satisfy with the grouping, could it be the reason or my gun does not take v-max with my powder.

should i try a new batch with minimum crimping to sée if better?

Mickal

You normally don't crimp rifle bullets. Very few even have a crimping grove, Many years ago I shot a 7mm rem mag. If I remember correctly the 7mm. 154 gr Hornady Round Nose had a crimp grove. Never crimped them. Maybe if you had a tubular magazine like a lever action 30-30???

 

[INTJ]

Using the Lee Factory Crimp Die is often a VERY good choice in bolt action rifles. Just the other day when working up a load with Hammer Hunter 124s in a 6.5 Creed, groups really tightened up when we started using the Lee Crimp Die. Like .35" at 100 and 1.2" at 385 yds. Uncrimped they were much larger.....

Also, see what happens to uncrimped rounds in the magazine of a 416 Rem or 458 Lott.

It's hard to imagine a Lee Factory Crimp Die all by itself causing a load to go over pressure unless it was a hot load already.

Maybe with a standard die and really heavy roll crimp, where the case is forced into and deforms the bullet, coos do it all by itself .

 

[acloco]

High recoil bolt guns can use a LIGHT crimp.

Something that weighs 7 pounds and uses more than 38 grains + of powder would generally be in this group.

 

[lb-ft]

Winchester, Remington, Federal; can’t say as I’ve ever seen one of their rifle cartridges lack a crimp. Even the low power rounds like 30-30, 222, etc., some of them shoot quite well and nearly all are more than satisfactory in my experience with hunting rifles.

 

[Homerange]

And if i add a Lee collet neck sizer.

It is to carry for hunting.

Still a bad juju

Mickal

That's all I use for any caliber.

What's your brass ? New or fired ?
Powder ?
How deep are you seating projectiles as if too deep this can lift pressures too.

Also be aware not all 55gr projectiles are created equal which is why we sometimes see loads in loading books vary considerably even with the same weight projectile so swapping one for another can catch you out.

 

[Dub]

Using the Lee Factory Crimp Die is often a VERY good choice in bolt action rifles. Just the other day when working up a load with Hammer Hunter 124s in a 6.5 Creed, groups really tightened up when we started using the Lee Crimp Die. Like .35" at 100 and 1.2" at 385 yds. Uncrimped they were much larger.....

Also, see what happens to uncrimped rounds in the magazine of a 416 Rem or 458 Lott.

It's hard to imagine a Lee Factory Crimp Die all by itself causing a load to go over pressure unless it was a hot load already.

Maybe with a standard die and really heavy roll crimp, where the case is forced into and deforms the bullet, coos do it all by itself .

OP is loading a 22-250

 

[Mickal]

Brass fired 1 or 2 from the same rifle, remington 788 in 22-250
Brass winchester.
Powder superformance
seat at 2.375
bullet v-max 55gr. data from hodgon with v-max bullet

The same load with sierra 55 gr.
Was Good but was seated at 2.360

i reset my Lee crimping at half the recomanded setting.

will reload an other 5 groups without crimping to see. If Good will try again with very lite crimping to see.

mickal

 

[INTJ]

OP is loading a 22-250

And I mentioned shooting a 6.5 Creed.......

Crimping is just another tool to help us tune loads. My LR BR rounds don't get crimped. Many of my hunting rifles do.

Regardless, the idea that all crimping is bad is simply incorrect.

 

[Homerange]

Brass fired 1 or 2 from the same rifle, remington 788 in 22-250
Brass winchester.
Powder superformance
seat at 2.375
bullet v-max 55gr. data from hodgon with v-max bullet

The same load with sierra 55 gr.
Was Good but was seated at 2.360

i reset my Lee crimping at half the recomanded setting.

will reload an other 5 groups without crimping to see. If Good will try again with very lite crimping to see.

mickal

Again, you don't need to crimp a bolt rifle in this class.

Can you clarify this ?
Powder superformance + data from hodgon (confused)

 

[243winxb]

Hodgdon online data does not list Superformance powder with a 55 gr bullet.
The powder burn rate is to slow for a 55 gr bullet with light neck tension provided by a Lee collet neck sizer.

Here the crimp is needed to in increase start pressure before bullet movement.

The 60 GR. HDY V-MAX is listed with Superformance powder. But still will need good neck tension/bullet hold.

My guess.

 

[Twicepop]

The only rifle rounds that I crimp are for slam feed semi-automatics, and tube feed lever guns. For the semi-autos they get either a slight neck down type of crimp with the LEE FCD for cannelured bullets or a taper crimp with a taper crimp for non-cannelured bullets. For tube fed lever guns, they get a roll crimp in the bullets cannelure. Recoil and magazine spring pressure can shove the non crimped bullets deeper into the case raising pressure to a possible dangerous level. For these two types of guns, 100% reliability trumps pin point accuracy with me.

 

[0.1 Aggregate]

Something is just wrong with the OP’s description.

- The Sierra bullet is fine with identical loads but the Hornady shows sticky bolt lift with a mid-range load?

- He is using Hodgdon data when there is none?

- Neither bullet has a crimping groove so he’s swaging the bullet in the crimp die.

I’m with the majority, I don’t crimp my 22-250, why someone compares it to a .416 is confused and beyond the scope of the thread.

 

[243winxb]

7.62 Crimp- Delayed Ignition/Free Space.​

https://apps.dtic.mil/docs/citations/ADA341390 To avoid Delayed Ignition, use a mag primer, seat bullet deeper into the case, use a bulky powder that better fill the case. Increase bullet pull with a crimp, as a last resort. Crimps may hurt accuracy. Doing your own testing is the only way to know.

 

[SSL]

Simply properly size the cases and forget the crimping. Your sizing and the die mandrel will take care of the proper size for a good grip on the bullet. Crimping is useful for semi-autos or lever guns with tubular magazines (as Twicepop correctly mentioned), but unless the cartridge in question is a heavy recoiling one (and the .22-250 certainly isn't on that list) you are only introducing more variables. The case-neck tension resulting from the sizing die should be more than sufficient to hold the bullets in place without crimping. The problem with crimping is that it can deform the bullets if over-done and must only be used with perfectly uniform case lengths. Case length variations will result in large variances in crimp force, creating inaccurate ammunition. In the worst examples, if the cases are inordinately long the crimp will be severe enough to jump pressures violently or even possibly allow an overly long case to be jammed in the throat.
In nearly 60 years loading I have never crimped any cartridge unless it was intended for handguns or firearms as mentioned above or possessing heavy recoil...usually .338 and up. Your .22-250 is by no means within this group.