6.5x 47L and N-550

[kev77]

Anyone have any luck with N-550 and 140gr bullets. Thanks in advance.

 

[kev77]

Well fire forming brass today and 39.5gr of n550 got me to 2790fps with 140s and 26" barrel. No pressure went up to 40.6 gr still no pressure at 2840fps. Node at 39.5gr.

 

[6MMsteve]

I shoot it in my 260rem and 6xc it's a great powder from what I have shot... 38.5 in the 6xc can go higher but it shoots good so it's good..plus it is plentiful no problem finding 550

 

[muleystalker]

How Temp Stable is N550?

 

[marchx]

How Temp Stable is N550?

It's not the most temperature stable powder to be honest. This is why VV launched N555 to adress this issue. Much more stable in my experience.

 

[FeMan]

According to Quickload, the heat of explosion for N550 is 4050 degrees (the same as Varget). N555 is 3700. That makes N555 a LOT more attractive to me for match-type shooting.

 

[kev77]

I find N550 is vit's version of Rl17. Probably more stable then rl17. Interesting to see that 555 is very cool burning.

 

[AckleymanII]

According to Quickload, the heat of explosion for N550 is 4050 degrees (the same as Varget). N555 is 3700. That makes N555 a LOT more attractive to me for match-type shooting.

Those with Ears, let them hear!

 

[22BRGUY]

I also was pleased with N550 in a 6 dasher as long ago as 12 years ago. I only switched because the story was it was hard on barrels but it did perform for me.
35.2 grs. with 108's.

 

[kev77]

Not too bad. Shooting off bipod and rear bag, action not bedded. If nothing else it will work for fire forming.

 

[6MMsteve]

Those with Ears, let them hear!

yes it's a hot powder, I found that out quick, must take baby steps, better than staball 65 it got me quick without warning signs, I didn't blow nothing up and it was cold also I'm really glad it happened when it was cool, just super heavy bolt lift but I pulled bullets and took warm temp consideration into the charge, I shoot quit a bit in winter, so there u go

 

[sharp.shooter.ser]

Gonna try N550 and 140 ELDM. My max oal is 2.817", but gonna use 2.811". 28" MRR Sabati barrel. Was thinking to start at 40 gn, then 40.5 and 41 (according to QL that shouldnt be in the red). Anyone tried this combo before?

 

[AckleymanII]

N550 EATS barrels, you have been warned! TWICE!

 

[sharp.shooter.ser]

Thank you for the warning. That will happen even with mild lodas (39g?)? I've been using N140 until now, also mild loads.

 

[kev77]

N550 EATS barrels, you have been warned! TWICE!

They make more barrels every day.

 

[AckleymanII]

Yea, they do.

Barrel replacement being a 6 month to 1 year wait, and total expense up to $800 being chicken feed for some and a hardship for others Obviously, I am of the latter.

 

[sharp.shooter.ser]

My node for 28" MMR Sabatti barrel was 39.5 and 71.4mm oal. No pressure, and per QL its below 57500 psi, mild on recoil.

 

[Chocdawg]

VV N550 + 136 Scenars worked well for me in prone LR game.

 

[barefooter56]

N550 EATS barrels, you have been warned! TWICE!

I use N-550 in my .308 WIN , 6.5X47 LAPUA and 6BR and have not found this to be the case. In regard to temp stability. NO powder is stable at all temperatures due to the many other variables besides ambient temp that can affect it. Do your load development in the temp range you will be shooting in for safety is my advice.