300 rum rl25 and rem 9 1/2m primers ?

[Sas874runner]

Changed primers from my normal loads so did a new work up using rl25 and 180 AB. My original load was 95 gr rl 25 with fed 215 primers. Average velocity was 3330. Starting at 93 gr and working up in .5 gr incriments to 95. Velocities were faster by almost 100 fps from the start. Has anyone used these primers with this powder. 93 gr average velocity was sitting around 3330 fps. With 95 gr averaging 3480 fps. Not sure if ths is right...

 

[JD338]

It seems a little fast but it could just be your barrel is a fast one. So long as you have no excessive pressure signs and good case life and acceptable accuracy, life would be good.
What chronograph are you using?

JD338

 

[SJB358]

Either way, that is a screamer! Never used Rem 9 1/2M's so I can't speak to them.

 

[Guest]

I've often wondered if the Fed 215 Primer could cause excessive pressure vs other ones. I did consider trying other primers but never got around to it. But feel in colder temps with a big powder column the fed 215 primer shines.

Don

 

[Sas874runner]

Chrony alpha. Just pushed some appintments back and took the 300 out for a few minutes to try and verify. Loads with both fed 215 and rem9 1/2m. Loads shot the same numbers as before. Fed primers at 3330 and rem primers shot an average of 3480!!! Large spread push 40fps and small spread 2 fps. I was just unsure due to the fact it seems that very few people use rem primers. May have to try some other loads with them....

 

[Sas874runner]

That velocity would put muzzle energy at 4840!

 

[FOTIS]

200 acuubonds 92.5 rl 25 3147 fps and .675" at 300 yards. My buddy bought that rifle from me.

 

[Sas874runner]

That is one hell of a tack driver with a whole lot of energy.

 

[Antelope_Sniper]

SAS, I've seen 100+ fps differences due to primers before.
If you go from a CCI 200 to a WMRP in a .270 Win with H4831, the WMRP will give you an extra 100 fps.
As I keep saying, primers really do matter.

 

[Sas874runner]

I have haerd it but drom what I have heard and researched rwmington is normally the coldest of the primers. Just was not expecting to see that big of a jump in that direction. Especially from what I have read. Experiance always proves otherwise.

 

[FOTIS]

SAS, I've seen 100+ fps differences due to primers before.
If you go from a CCI 200 to a WMRP in a .270 Win with H4831, the WMRP will give you an extra 100 fps.
As I keep saying, primers really do matter.

YUP cci 200 is the coldest cap out there

 

[DrMike]

SAS, I've seen 100+ fps differences due to primers before.
If you go from a CCI 200 to a WMRP in a .270 Win with H4831, the WMRP will give you an extra 100 fps.
As I keep saying, primers really do matter.

And that results from increased chamber pressure. If you are pushing pressure limits, you will degrade brass more quickly. A hot primer can change the game pretty quickly.

 

[Guest]

I'm lost here, someone enlighten me. I always thought the hotter the primer the more it adds to the pressure. How then is gaining more velocity accomplished if Fed 215 is the hottest primer verses the Remington 9.5 primer, a colder primer?

Don

 

[SJB358]

I'm lost here, someone enlighten me. I always thought the hotter the primer the more it adds to the pressure. How then is gaining more velocity accomplished if Fed 215 is the hottest primer verses the Remington 9.5 primer, a colder primer?

Don

Don, I am not sure either, but I just chronoed some RL22 loads with CCI250's and Fed 215M's. The CCI250's were 50FPS faster than the 215M's over a 5 shot string outta my rifle. I always thought Federals would be "faster" than the CCI's, but for my current lot of both primers, it isn't the case? I learn something new everyday.

 

[Guest]

Scotty,
I hear you. This makes me believe I should revisit my current 200 AB load in the 300 RUM and re-try RL-25 & Retumbo again. I was getting 3200 fps with Retumbo Powder using Fed 215 and initial tight groups but getting pressure signs, wiping the case heads. At the time I realized Retumbo peaks faster compared to RL-25 and wondered if the Fed 215 Primer was contributing to the problem. I have CCI-250's on hand. Will see about the Remington 9.5's. This is very interesting!

Don

 

[FOTIS]

The Rum has a lot of possibilities with the 200 AB and rl 25 and retumbo.

 

[Sas874runner]

It has me rethinking alot of my loads. Make me wonder if a powder I was unhappy with could have been turned to an accurate load by cuanging primers

 

[Oldtrader3]

Primers are still a dark art, I think. All other components in handloading are pretty well understood but primers still are a mystery. Personally, using a really slow powder in a big case is not the ideal use of Remington 9-1/2m primers? My opinion would be to maybe try Win LRM or CCI 250's, drop 5% and work up.

 

[Guest]

OT3,
I have thought as you do, slow powders need a heavy spark, especially with a long column of charge. I had this thought. Then Remington's Factory offerings use 9.5 primers to ignite 180 & 200 grainers ,then what powders are they using to drive the load? Maybe they aren't using a powder as slow as RL-25 & Retumbo. I think I'm gonna at least try CCI-250 Primers, may even have WLRM on hand too.

Don

 

[Sas874runner]

The reason I went with thwm is because I was loading fed 215's but I have not seen any on the selves here in months. The only primers I can find is rem 9.5m. Are these not as hot as fed 215? If they are not how are they running loads faster than fed primers. Just trying to get a sense of different primers.