6 dasher

[Brawley_z06]

ive been loading for this rifle for about a year now. i run lapua 6br brass. has about 5-6 firing. i loaded some rounds last night and i noticed when i ran my mandrel thru it felt like it was doing not hardly even touching the brass. when i seat the bullet i can move the bullet in and out by hand and even pull the bullet. i am running a 266 bushing in a fl sizing die and a 21st century 242 mandrel. any help would be great, thanks in advance

 

[JFrank]

Use a smaller bushing, maybe loose the mandrel

 

[quest450]

do you anneal after every firing, sounds like springback issue

 

[Brawley_z06]

Use a smaller bushing, maybe loose the mandrel

ya i was thinking of going to a 265 bushing

 

[Brawley_z06]

do you anneal after every firing, sounds like springback issue

yes. the ones that are loose when i run the mandrel it feels like it dont even touch the inside of the case

 

[quest450]

I'd use a pin gauges to measure neck ID after you resize to see if or how much variance there is

 

[JFrank]

ya i was thinking of going to a 265 bushing

Or smaller, Bullet hold is your friend until it isn’t .

 

[Brawley_z06]

Or smaller, Bullet hold is your friend until it isn’t .

is i go done to smaller bushing you think i would be fine still with the 242 mandrel the ones that are good it holds good its just some of these that im having issues with now. i wouldnt think id need to pitch the brass

 

[JFrank]

I wouldn’t pitch any brass just add more grip.
A .242 mandrel only gives you .001 dimensional difference on the bullet, that would be a disaster on the target in my BR-A.

 

[Brawley_z06]

I wouldn’t pitch any brass just add more grip.
A .242 mandrel only gives you .001 dimensional difference on the bullet, that would be a disaster on the target in my BR-A.

what do you suggest?

 

[JFrank]

I’ll tell you the absolute truth as I know it, if you don’t test neck tension for yourself then you will be behind the curve against your piers.
Every one has different methods but I would at least temporarily loose the mandrel and test smaller and smaller bushings. It will shoot better and better until it shoots crappy.

 

[quest450]

smaller bushing will solve your problem but you're sweeping neck tension issue under a rug
I think you need to get to the bottom of it and fix your inconsistency, if you add more neck tension you will still have inconsistent seating pressure and bullet release and that will show on a target, if you're just plinking steel a smaller bushing is a great solution but if you're a target shooter you have to address neck tension

 

[JFrank]

smaller bushing will solve your problem but you're sweeping neck tension issue under a rug
I think you need to get to the bottom of it and fix your inconsistency, if you add more neck tension you will still have inconsistent seating pressure and bullet release and that will show on a target, if you're just plinking steel a smaller bushing is a great solution but if you're a target shooter you have to address neck tension

Awesome advice, mark how would you go about finding the issue ?

 

[quest450]

Awesome advice, mark how would you go about finding the issue ?

That's a tough question Frank, not knowing many details it's a shot in the dark
were the necks turned ?
AMP annealed or flame (inconsistency)
I went away from mandrels and my agg's improved BUT good neck prep is a MUST !
Sometimes you just have to sacrifice a batch of brass and start from scratch

 

[Bill Norris]

As mentioned drop down in bushing size and down in mandrel size. 3 to 4 thousandths below loaded neck diameter with bushing and then two thousandths below bullet diameter with mandrel and give it a try. This is the method subscribed by one of the best F-class shooters in the field. Erik Cortins.

 

[Brawley_z06]

As mentioned drop down in bushing size and down in mandrel size. 3 to 4 thousandths below loaded neck diameter with bushing and then two thousandths below bullet diameter with mandrel and give it a try. This is the method subscribed by one of the best F-class shooters in the field. Erik Cortins.

ya i just ordered a 265 bushing and 241 mandrel. my loaded diameter is 267-267.5

 

[Brawley_z06]

That's a tough question Frank, not knowing many details it's a shot in the dark
were the necks turned ?
AMP annealed or flame (inconsistency)
I went away from mandrels and my agg's improved BUT good neck prep is a MUST !
Sometimes you just have to sacrifice a batch of brass and start from scratch

yes annealed with annealez. no the necks are not turned. this a prs gun not a bench gun. it shoots well the way i have been doing it but now i just noticed some of these cases with this issue

 

[quest450]

yes annealed with annealez. no the necks are not turned. this a prs gun not a bench gun. it shoots well the way i have been doing it but now i just noticed some of these cases with this issue

tighter bushing is your best solution....you can only squeeze so much blood from a rock I guess

 

[Bill Norris]

ya i just ordered a 265 bushing and 241 mandrel. my loaded diameter is 267-267.5

A .264 bushing may even work better. Dont be afraid to bring neck diameter down a bit more. U have to consider springback into the equation.

 

[Brawley_z06]

A .264 bushing may even work better. Dont be afraid to bring neck diameter down a bit more. U have to consider springback into the equation.

went ahead and ordered one of those also lol