30br Help request!

[Batraven]

Hello Shooters,

I have a 30br Lilja 1/17 26" 330 chamber neck and trying my best to get her
accurate.
Im using Lapua brass with a load of 34.5 VV N130 with a 115 VLD Berger bullet.
My cases are trimmed to 1.510 and neckturned to meassure 328 with a bullet in it.
Some friends of my shoot the same exact load and this seems to work fine for them.

I break in my barrel and have shot 100 rounds right now.
Thing is it just wont want to make small groups for a reason.
If tryed several different seathing dephts but even this did not make it perform better.
All the brass is now beeing shot ones so maby it is not accurate while fireforming it?

What is your opinion about this and what am i doing wrong?

Thx

 

[bdale]

I'm a member here at Piedmont Gun Club and most if not all the 30br shooters here use H4198 almost exclusively. We have some top tier shooters that compete here, maybe this powder will help

 

[Batraven]

I'm a member here at Piedmont Gun Club and most if not all the 30br shooters here use H4198 almost exclusively. We have some top tier shooters that compete here, maybe this powder will help

Yes sir i know the powder but the thing is its hard to
get in the Netherlands.
VV N130 shoots well by several friends and they all shoot 30br's and they are
top shooters here in the Netherlands.
Anyway thank you for the comment!

 

[LHSmith]

Action/ Freebore? 115 Berger VLD must be a misprint. Also barrel contour and gun weight? Using new brass will not yield the optimum results due to it most likely having excess clearance between the case shoulder and your chamber.

 

[M-61]

Don't know about availability where you are but A2015 has worked as well as 4198 for me.

 

[Batraven]

Action/ Freebore? 115 Berger VLD must be a misprint. Also barrel contour and gun weight? Using new brass will not yield the optimum results due to it most likely having excess clearance between the case shoulder and your chamber.

Action is a sa rem 700 and the gun weights about 8 kilograms.
Barrel contour is m24
Freebore if tryed is 0.005 and up to 0.040 in steps of 0.010

 

[Batraven]

this is the reamer so i believe the freebore is 0.10

 

[tenring]

Most of the 30BR "Robinette" reamers with tight .330 neck have zero freebore; can't enlarge your reamer print to read yours. N160 is a decent powder for this cartridge; but the hands down favorite is H4198. I have also shot RL7, norma 200 and Benchmark with good results.

Custom bullets may shoot better. Are you jamming them into the lands, just kissing or jumping? How much?

The Berger 115 gr. flat base (not VLD) bullets shoot OK, not fantastic - in a 17 twist.

 

[gunsandgunsmithing]

Most of the 30BR "Robinette" reamers with tight .330 neck have zero freebore; can't enlarge your reamer print to read yours. N160 is a decent powder for this cartridge; but the hands down favorite is H4198. I have also shot RL7, norma 200 and Benchmark with good results.

Custom bullets may shoot better. Are you jamming them into the lands, just kissing or jumping? How much?

The Berger 115 gr. flat base (not VLD) bullets shoot OK, not fantastic - in a 17 twist.

Surely N 160 is a misprint as it's way too slow.

 

[LCazador]

First of all if your print is correct, you have zero freebore. What size bushing are you using in the full length die (assumption) and how far back are you pushing the shoulder on each reload? Two or three thousands neck tension is all you need. So a .325" or .326" bushing should do the job. This is without the expander button in place. Sounds like you have your cases fireformed so you should be good to go. You're trimming to 1.510" and your chamber is 1.520", that's ten thousands under your chamber length. Did you check this after fireforming? Is everything tight on your scope mounts?

 

[gunsandgunsmithing]

Is all testing being done while using wind flags?
I Know, it may be a silly question...but only if you say YES!

 

[Batraven]

First of all if your print is correct, you have zero freebore. What size bushing are you using in the full length die (assumption) and how far back are you pushing the shoulder on each reload? Two or three thousands neck tension is all you need. So a .325" or .326" bushing should do the job. This is without the expander button in place. Sounds like you have your cases fireformed so you should be good to go. You're trimming to 1.510" and your chamber is 1.520", that's ten thousands under your chamber length. Did you check this after fireforming? Is everything tight on your scope mounts?

Bushing i used is 325 and 326 in my FL die.
No did not yet checked the lenght after fireforming.
I will look in to it before the next load.
Scope mounts are ok i believe.

 

[Batraven]

Is all testing being done while using wind flags?
I Know, it may be a silly question...but only if you say YES!

All testing is beeing done indoor 100m
No wind no mirrage.

 

[Batraven]

Most of the 30BR "Robinette" reamers with tight .330 neck have zero freebore; can't enlarge your reamer print to read yours. N160 is a decent powder for this cartridge; but the hands down favorite is H4198. I have also shot RL7, norma 200 and Benchmark with good results.

Custom bullets may shoot better. Are you jamming them into the lands, just kissing or jumping? How much?

The Berger 115 gr. flat base (not VLD) bullets shoot OK, not fantastic - in a 17 twist.

if tryed jamming them and worked my way up to 0.050 from the lands in steps of 0.005
Shoulders where set back so the bold closed without resistance.

 

[stgw77]

My 17 twist 30BR Lilja is 30" long. I also use N130 with great results. I tried Knights 112 grs (very weel made bullet!), which have very short bearing surface, I found out Speer 125 grs TNT with longer bearing surface works better in my 3-groove barrel. Fed 205M primer, 6-12 thou jam, 33.7 grs N130 for 2985 FPS. Groups in 1s.

 

[LHSmith]

Shoulders where set back so the bold closed without resistance.

For best accuracy you should be measuring actual set-back rather than relying solely on the "feel" method.
I agree on trying other bullets. The 125 TNT's can win matches if sorted.

 

[Batraven]

Shoulders where set back so the bold closed without resistance.

For best accuracy you should be measuring actual set-back rather than relying solely on the "feel" method.
I agree on trying other bullets. The 125 TNT's can win matches if sorted.

Hello,

I will try these other 125 TNT's if i can get them.
How can i try the best to meassure the actual set-back in your opinion?
i have the Sinclair headspace gauge but i think its not that good.

 

[M-61]

Quote:
"Scope mounts are ok i believe."

This I would be sure of......not "I believe". It's easy to overlook and why not be sure?

 

[Batraven]

Quote:
"Scope mounts are ok i believe."

This I would be sure of......not "I believe". It's easy to overlook and why not be sure?

You are right to be sure of afcourse.
But i checked this after shooting at the range.
Its all tight and in line.

 

[LHSmith]

How can i try the best to meassure the actual set-back in your opinion?
i have the Sinclair headspace gauge but i think its not that good.

I use the Sinclair Bump Gage Insert, but I prefer to measure using the insert by itself without the gage holder (Bump Gage Body) that clamps to the caliper.