FB for108 ELD-M and 87 V-Max

[RAG]

I'm having Dasher reamer made up, to shoot varmints. Primary goal is to shoot 87 V-Max, but also want to (potentially) shoot the 108 ELD-M and 105 A-Max. Trying to ascertain if .170 FB is too much fore 87 Vmax.

The 87 V'max, coincidentally, is near identical to the 88 FB Bergers, and some 103 Match bullets I played with...in respect to the distance from the BT/BS/Pressure Ring to the Ogive. With .105 FB I currently have, all are near max seating depth before they reach the shoulder/neck junction on the Dasher case. So I think a little more FB would be better, even if the only bullet I wanted to shoot was the 87 Vmax or 88 Berger FB...I think .125 would be more suitable and use up most of the neck. As for the 108 ELD-M and 105 A-Max, I read on forum here that .180 is good. Before reading up, my own measurements, using deductive measurements from my current 105 FB, I think .170 would be enough FB.

However, without any jump, .170 FB would mean that the 87 Vmax would have about .15" of bearing surface contact with the neck instead,...visually looks to be about 2/3rds of this short neck (and of course the bottom of the bullet is into the mid shoulder area). Anyway, is there any reason this wouldn't work ("just" .15 in the neck) for the 87s? I am thinking not, as I have another gun that can shoot in the 1s with just .10 of the BS into the neck...but wanted to seek opinions and make sure it wasn't too much of a compromise to have FB to shoot such different bullets?

Thanks!

 

[urbanrifleman]

Tricky.

150 fb. The 87 vmax and 88 Berger are somewhat different. I'll post some pictures.

 

[RAG]

Tricky.

150 fb. The 87 vmax and 88 Berger are somewhat different. I'll post some pictures.

hmmm, okay, I'll have to go back and do my measurements. I found them to be within about .010 of eachother, if I recall correctly. (ogive to the shank (BT/BS juncture). I recall I used a 6mm comparator on both ends of the bullet and these two bullets were really really close, believe it or not.

Edit: I just measured ogive to shank...they are actually within .003, believe it or not

 

[urbanrifleman]

hmmm, okay, I'll have to go back and do my measurements. I found them to be within about .010 of eachother, if I recall correctly. (ogive to the shank (BT/BS juncture). I recall I used a 6mm comparator on both ends of the bullet and these two bullets were really really close, believe it or not.

Edit: I just measured ogive to shank...they are actually within .003, believe it or not

Next Generation Varminter

A lot of my varmint hunting customers are discovering some of the new calibers, stocks and chassis options that are available today. Many are traditionalists. Long story short I'm going to be doing a new build for pdogs and I will be using a 6bra barrel on a Mack Bros action on an MPA Chassis...

forum.accurateshooter.com

Look at my pictures. Just for reference.

 

[RAG]

Next Generation Varminter

A lot of my varmint hunting customers are discovering some of the new calibers, stocks and chassis options that are available today. Many are traditionalists. Long story short I'm going to be doing a new build for pdogs and I will be using a 6bra barrel on a Mack Bros action on an MPA Chassis...

forum.accurateshooter.com

Look at my pictures. Just for reference.

Right...but the 87 vmax poc is with 50 FB and the 88 Berger is with 105 FB. With same FB, they would be the same...im certain of it. They are on my 105 FB anyway...with short Dasher neck? The shank/pressure ring is nearly at bottom of neck for both with kissing the lands. OF course, the bottom of the bullet, given the long boattail on the 87 Vmax, is going to be much deeper into the case.

In any case... I was trying to ascertain if a longer freebore, like .170 or .180, to handle the 108 ELD-M would still work well with 87 Vmax. But I think I'm simply gonna get a .120 or .130 FB for the 87 Vmax and then extra throater if I want to make it longer...simply solution I think.

 

[urbanrifleman]

Right...but the 87 vmax poc is with 50 FB and the 88 Berger is with 105 FB. With same FB, they would be the same...im certain of it. They are on my 105 FB anyway...with short Dasher neck? The shank/pressure ring is nearly at bottom of neck for both with kissing the lands. OF course, the bottom of the bullet, given the long boattail on the 87 Vmax, is going to be much deeper into the case.

In any case... I was trying to ascertain if a longer freebore, like .170 or .180, to handle the 108 ELD-M would still work well with 87 Vmax. But I think I'm simply gonna get a .120 or .130 FB for the 87 Vmax and then extra throater if I want to make it longer...simply solution I think.

Similar.

 

[RAG]

Oh very cool. Thanks for sharing. With the 104FB, the shank on those are only 2/3rd down the neck, but in the Dasher, it's 95% down, and with a little jump, maybe dangerously close (on a tight neck) to having the shank in the neck/shoulder junction. So I think .120 could be ideal for the short Dasher neck...and I've even heard guys with .150 having great luck with the 87 Vmax.

 

[urbanrifleman]

Oh very cool. Thanks for sharing. With the 104FB, the shank on those are only 2/3rd down the neck, but in the Dasher, it's 95% down, and with a little jump, maybe dangerously close (on a tight neck) to having the shank in the neck/shoulder junction. So I think .120 could be ideal for the short Dasher neck...and I've even heard guys with .150 having great luck with the 87 Vmax.

I have a Dasher barrel here with a 150 fb but I don't have a Dasher case to show the position.

 

[RAG]

I have a Dasher barrel here with a 150 fb but I don't have a Dasher case to show the position.

And I don't have 150 FB, lol. But the shank of the 87 Vmax ought to be about 2/3rds down the neck...with maybe .170 of bearing surface in the neck, according to my deductive match from the .105 I have.

 

[gunsandgunsmithing]

If you have a .104fb now and want to know where the bullet will be with say a .154 fb, just move your bullet out .050 and see where it puts it. That should get ya really close to what you want to know.