V-N555 in a 6.5 CM

[paul o']

I know in my .270 with 130 fox its a bit of a crunchy.

 

[GregorG]

For hunting I am using Lapua SR cases, Fox bullets 123gr, VV N555 43,4gr and OAL 68,55mm.
Speed is 850m/s, SD=4, group in 2 euro cent

 

[stevenedwards]

For hunting I am using Lapua SR cases, Fox bullets 123gr, VV N555 43,4gr and OAL 68,55mm.
Speed is 850m/s, SD=4, group in 2 euro cent

Some actual data to work with many thanks, I will track down some Lap. cases.

 

[baguio]

Some actual data to work with many thanks, I will track down some Lap. cases.

Not Lapua SR cases. That's also what I'm using. Don't know if small or large primer pockets makes a difference but suspect that it might?

 

[stevenedwards]

Not Lapua SR cases. That's also what I'm using. Don't know if small or large primer pockets makes a difference but suspect that it might?

I have never tried SR cases so I don't know. I have enough trouble the the variables i'm working with already !

 

[jcampbellsmith]

...Trying to run 120/123gr. copper in a Creedmoor may not be feasible and I should be looking to 100/110 gr. bullets....

Sako manage to do it and they shoot very well.

Sako 6.5CDMR 120gr Powerhead II

The Sako Powerhead II (Barnes Tipped TSX®) has a polymer tip and a re-engineered nose cavity to provide an even faster expansion when compared to the original Powerhead (TSX®). The polymer tip initiates rapid expansion and improves ballistics at longer distances making it a versatile bullet at...

www.bluefieldsports.co.uk

Regards
JCS

 

[stevenedwards]

Sako manage to do it and they shoot very well.

Sako 6.5CDMR 120gr Powerhead II

The Sako Powerhead II (Barnes Tipped TSX®) has a polymer tip and a re-engineered nose cavity to provide an even faster expansion when compared to the original Powerhead (TSX®). The polymer tip initiates rapid expansion and improves ballistics at longer distances making it a versatile bullet at...

www.bluefieldsports.co.uk

Regards
JCS

But do we know which powder they use ? Perhaps a high energy one requiring a smaller charge, I don't know.

 

[Roonster]

@Laurie RE-17 / RS60 / N550 / N555 for a 6.5mm Creedmoor 140gr ELD-M out of a 24" barrel. What would be your choice? Or are they all much of a muchness?

 

[Utectok]

I shoot n555 and find it very good I actually go one grain over vhit max
If fits no bother with a drop tube. Vhit max tends to be very anemic in my view. I’d test your equipment it is unlikely to be vhit max data?

 

[jb7x57]

Just working a load up now Norma cases 112 grn yew tree bullets vit N150
The top 4 are 50thou off bottom 2 65 thou off the speed seems slow for the load data so going to check with another chronograph

 

[paul o']

Found a good R16 load with YewTree 112 gr

 

[Laurie]

@Laurie RE-17 / RS60 / N550 / N555 for a 6.5mm Creedmoor 140gr ELD-M out of a 24" barrel. What would be your choice? Or are they all much of a muchness?

Whichever works best in practice - all are suitable for the cartridge and bullet. All I can say based on specifications is that N555 is a 'milder' grade than RS60 or N550. These days, availability is often more important than other factors, of course!

 

[Roonster]

Whichever works best in practice - all are suitable for the cartridge and bullet. All I can say based on specifications is that N555 is a 'milder' grade than RS60 or N550. These days, availability is often more important than other factors, of course!

Thank you!

 

[Neddle]

I am interested in other peoples experience of loading the CM with this "specially for creedmoor" powder.
I can't get the stuff in the case. Vhit. data gives a "full case" load which seems not to be correct, at that load the case is overflowing, what use is that ?
Also I am reaching compression well before the "c" symbol in the load data, close to two grains.
Petersen large primer brass once fired.
The problem is made worse as I'm trying to find a non lead load. copper bullets of around 120gr seem to seat deeper than traditional bullets, particularly the Fox 123gr which appears unusable with N555. Thank goodness for N-150
Ive spent to much time trying to settle the powder by various means to little effect.
Is 120gr copper to big in a creedmoor ?
Rant over. Advice appreciated.

You tried a drop tube?