Anyone tried Reloader 15.5?

[Old Rooster]

I was hoping this would fall around LVR/CFE223 burn rates/pressures. There's a ton of cartridges I shoot that would be "optimal" in that range, but I hate the temperature sensitivity of those two powders, and RL16 is just a tad too slow with the case volume available. Based on Alliant's load data, I would have expected this to be a touch slower than Varget, not so close to RL15. That's really unfortunate.

I was reminded that the percentage of slow or fast is not really known yet.
It may work in cartridges you need it to work.The only way to know is to try it since you have some.
This Saturday morning I am starting on my 30-06 trial loads to see if it's too slow for 152 gr H H.

 

[Carlos88]

Braggarts! All of yinz!

 

[Old Rooster]

Sorry Carlos88 you haven't found any yet but I'll keep watch for you and if I see something I will send you a notice.
Old Rooster

 

[Old Rooster]

ormandj I loaded my test rounds and will see what happens.
Steve at Hammer Bullets recommended the 152 gr for my 308 but I got greedy and was thinking of more speed so I loaded the 30-06 with them.
I ran out of bullets and ordered more just a minute ago.152 gr,166 gr,180gr.
I'll post results

 

[bubbaonpc]

I hope this is the answer for my Grendel !! RL15 is soooo close....along with Lever...8208...MR2000...Match Rifle...just to name a few. This mite be my 2600 fps ticket in my Mini Howa. I'm looking forward to playing with it when mine arrives...and seeing what fellow shooters find.

 

[Carlos88]

Sorry Carlos88 you haven't found any yet but I'll keep watch for you and if I see something I will send you a notice.
Old Rooster

No problem. I was just kidding.

 

[Old Rooster]

I figured that but still I will let you know if I see 15.5 anywhere Carlos88.

bubbaonpc I hope so.Let me know as I have a 6.5 Grendel upper for my ar that shoots great already but if I can get under 123 gr bullet it would be great for better velocity.
Muddyboots posted a sheet about loads for 6.5 Grendel and others.308 shows only bullets 175 gr and up so it may be a bit too slow for the bullets I like like 152 gr Hammer Hunters.Slower powders push larger bullets better in some cases.

 

[QuietTexan]

I'll trade you a pound for a pound of H4831SC.

 

[Old Rooster]

No thanks I only got 2 pounds and it won't last very long.Maybe the one of the others will want a trade.

 

[Seabeeken]

It's faster than reloader 16 and slower than 15. It's not "better" but it may be better for some cartridges. What are you reloading?

I suspect that reloder 15.5 is the result of adding decoppering agent and temp control coating to reloder 15 And slowed the burn of reloder 15. This seems to happen to powders where these are added. Im going to compare kernel size between the 2.

 

[Semperfireloading]

I suspect that reloder 15.5 is the result of adding decoppering agent and temp control coating to reloder 15 And slowed the burn of reloder 15. This seems to happen to powders where these are added. Im going to compare kernel size between the 2.

Hello. Actually, this is not related to RL15. This is a faster version of RL16, the kernals look identicle to RL16. The kernels for RL15 are much smaller, and totally different. If I gave you RL15.5 and Rl16 you could not tell the difference with your eye or scale. They are both super bulky powders.
Reloader 15.5 Review

Of course, people probably dont care about 5.56 here. But Valkyrie maybe. This powder, 15.5 is going to be ideal for 6MM cartridges, such as Creedmoor.

I hope this helps you.

 

[Old Rooster]

Semperfireloading I see this is your first post and a very good one too.Welcome to the best long range shooting forum ever.
Thanks for review link very good reading.The more I read about this powder the more I like it.
By the way Powder Valley re-listed the 15.5 powder and I will watch it like a hawk for myself and a few friends here on this thread,Quite Texan and Carlo88 just to name a couple.I loaded several 30-06 with 152 Hammer Hunters with 15.5 at at different powder weights but have not shot them yet due to health problems.
For those that did not get the Re15.5 keep watching Powder Valley site for a new batch of this powder.

 

[Semperfireloading]

Thank you Mr. Rooster. We just finished the pre-lim Valkyrie review with Reloder 15.5. WAY WAY better. Perfect powder for it, huge potential.
Valkyrie Reloder 15.5 Review

 

[Sockeye66]

Tried several different combinations in a 6.5 CM, all were decent although the velocity wasn't what I'd hoped, accuracy is certainly there. One load, 39gr with a 123gr SST runs 2785fps from a 22" barrel and shoots great. That'll be my sons load for deer.