Who's shooting Berger 80.5 Fullbores in 223?

[Danley]

Who here shoots the 80.5 Fullbores? How sensitive are they to setting depth?

 

[Billch]

I run them in my 223AI. I haven't had to experiment much with seating depth. I started at 2.460 and stuck with it.
I don't think these are all that jump sensitive. They were easier to get going right than the 75gr. A-Max for me.

B

 

[NORTH OF 53]

I am just starting to work on a load for mine. I have been seating 2.450 and that is about as long as I can go. I am going to have the throat made a little longer. just looking at where I would like to have them I am thinking a COAL of around 2.475-2.500 will put that 80.5 berger bullet about where I want it, as well as the 80 A-max I have been trying. I want them out there so I have a little more room in the case. I would like to try something a little slower than Varget and need room for more powder when I burn slower. I am running a 29" barrel 1:8 twist so I have more barrel than I need to try a slower powder. I can't go to a A.I. because I am going to shoot F T/R Class with it.

 

[beginner]

In my White Oak Precision service rifle upper, at 0.010" jump shoots 1.250" five shot groups at 200 yards. Found this setting best in this particular rifle.
beginner

 

[barefooter56]

Who here shoots the 80.5 Fullbores? How sensitive are they to setting depth?

Danley,
As Billch stated the 80.5 and 82 grain .223 bullets are not that sensitive to jump as the VLD bullets because they are a Tangent ogive design. For target I would suggest you start on the lands and work back towards the cartridge case in .005 increments to find your bullet seating depth accuracy node. I do this first because of the bullet seating depths affect on cartridge case powder capacity, pressure , velocity and accuracy :http://www.bergerbullets.com/effect...coal-and-cartridge-base-to-ogive-cbto-part-1/
http://www.bergerbullets.com/effect...coal-and-cartridge-base-to-ogive-cbto-part-2/
Any bullet seating depth testing should be done at the lowest powder charge listed for the bullet/powder/cartridge combination you are testing. Once the bullet seating depth accuracy node is found. Work the load up slowly checking for pressure signs and accuracy until your highest velocity accuracy node is found. This is how I do it but there are many other ways that work also.

 

[Huckleberry75]

Running them in my 223ai and 22cm. With the AI, I started at jumping .020 and haven't moved from there. Still fire forming, but they put together a 0.244" at 100yds when I was zeroing the scope. Not too shabby for a forming load. I push them with 8208xbr and cci-450's FROM WW brass. Itching for a coyote to have a brain fart..

 

[watercam]

Don't be afraid to jump them. A lot! I found a sweet spot at .025" off the lands then was advised to try at least .035" off and that has proven to be the best out to 600 yds..
As an aside, I am also shooting the Sierra 90 gr. SMKs out to 1000 yds. jumping .035" as well with very good waterline.
Palma shooters have been jumping the Sierra .308/155 Palma bullet from .030"-.040" as well and the Berger 155.5 Fullbores.
Well worth a few bullets to find out.

 

[swadiver]

i put them right on the lands. shoot outstanding out to 600 yds with either H4895 or IMR 8208 XBR