Long freebore reamer and light weight bullets for fire forming? accuracy?...

[22DASHER]

I have my own 6 Dasher reamer with a .2704 neck and 130 fb. I am building a couple 6 Dashers on 8 twists for the 105 class bullets.... My question is does anyone have any experience with a long freebore in a 12 or 14 twist for a fireforming barrel and how does it shoot 55-65 grain bullets? I was thinking about building a fireforming rifle for prairie dog shooting using a 12 or 14 twist and this reamer to keep all the brass as similar as possible. Let me know if any of you have any experience.

 

[bdale]

Want be able to reach the rifling with those light bullets, I have a .050 freebore on one of my guns and 65 grain bullets are only about a third of the way are less into the neck when at the rifling :-[

 

[22DASHER]

I know you cannot reach the rifling... That wasn't the question.

 

[savagedasher]

I have my own 6 Dasher reamer with a .2704 neck and 130 fb. I am building a couple 6 Dashers on 8 twists for the 105 class bullets.... My question is does anyone have any experience with a long freebore in a 12 or 14 twist for a fireforming barrel and how does it shoot 55-65 grain bullets? I was thinking about building a fireforming rifle for prairie dog shooting using a 12 or 14 twist and this reamer to keep all the brass as similar as possible. Let me know if any of you have any experience.

Yes it work fine we have a 6MM PC we use all the time. 29.3 gr varget with flat base bullets seated long where when closing the bolt they are hard in the lands. nice shape shoulders. Larry

 

[AckleymanII]

You have the option of shooting a 70g TNT which is very accurate and explosive on dogs.

 

[areaone]

#1 on that 70 gr TNT

 

[JayCutright]

I have chambered several 13.5&14 twist barrels with reamers from 104 to 135 freebore.They were mostly for fire forming Dasher brass but after the owners found them to be very accurate they started using them for varminting to. 55gr noslers are explosive on prairie dogs and accurate too. Most any bullet for a Benchrest match will shoot damn good even if you have to jump .100 to the lands.
False shoulder your brass to fire form and you won't need to jam the bullet.
Good luck!

 

[22DASHER]

Thanks for the info! That's exactly what I wanted to hear!

 

[wiuprof]

Here is my XP-100 that Jay Cutright chambered for me in 6 Dasher. It has a Shilen barrel with a 1-14" twist and I use it for fire-forming brass for
my competition rifles that he also chambered for me. The pistol shoots 75 gr. Hornady v-max bullets quite well while fire-forming.

Jay used the same reamer on this XP-100 that he used for my first 6 Dasher rifle, back in 2013. As Jay said above, I use the false shoulder method.
I've also used 75 gr. Hornady & even 80 gr. WW-bulk bullets for forming. The 80 gr. flat base WW's are the heaviest bullets that stabilize.