6.5 Weatherby RPM

[Monterey21]

I was interested in the 6.5 wsm myself. Seems like there was more people favorble to the 6.5 saum. 264 win mag had a spark rekindled a few years back but not so much interest anymore. Prc is all the rage and I have nothing against it other than I want to reach one of the possible nodes between 3100-3200 fps with 147s without wrecking cases. Thought about the 26 nosler but believe poor case fill could be a problem trying to run it throttled back. This rpm or the 264 win mag would get me to where I want to be. 6.5 saum is still in the back of my mind but I've wanted a 264 win mag for the past 10 years.

I have some input on the RPM vs the other 6.5's. I have 26 and 28 Noslers. They are in short box rifles. The 26 nosler has some top end performance way up there, 120 gr Barnes @ over3600 but for what. I re-chambered the 28 to 7mm Blaser Mag. Works great thru the 3.4 box and over 3100 with 168 Berger. I Necked it down to 6.5 and sent those samples to JGS Precision Tool. Reamer should ship tomorrow. I have a Mausingfield long action with all the components waiting on the reamer. I'm excited about this. With the RPM's Limited chambering and cartridge availability it will be a wildcat of sorts.
Blaser Brass is available from several shops and Dies will be available from Whidden. They made my Dies. I use Full Length Bushing for the 7 & 6.5 MM. The 6.5WSM has head-stamped brass from Bertrum. The 264 WM could well need the case head resized after two or three reloads. That is what turned me against the Belted cases. I think the 6.5 Blaser will hit the sweet spot between the 6.5 WSM and 26 Nosler.
I may be off point a little but sharing is a good thing.

 

[B23]

I have some input on the RPM vs the other 6.5's. I have 26 and 28 Noslers. They are in short box rifles. The 26 nosler has some top end performance way up there, 120 gr Barnes @ over3600 but for what. I re-chambered the 28 to 7mm Blaser Mag. Works great thru the 3.4 box and over 3100 with 168 Berger. I Necked it down to 6.5 and sent those samples to JGS Precision Tool. Reamer should ship tomorrow. I have a Mausingfield long action with all the components waiting on the reamer. I'm excited about this. With the RPM's Limited chambering and cartridge availability it will be a wildcat of sorts.
Blaser Brass is available from several shops and Dies will be available from Whidden. They made my Dies. I use Full Length Bushing for the 7 & 6.5 MM. The 6.5WSM has head-stamped brass from Bertrum. The 264 WM could well need the case head resized after two or three reloads. That is what turned me against the Belted cases. I think the 6.5 Blaser will hit the sweet spot between the 6.5 WSM and 26 Nosler.
I may be off point a little but sharing is a good thing.

I'm one of the OG 7mm Blaser owners so naturally I am a fan and can't wait to hear of your 6.5 Blaser results. I've got a LA Rem 700 sitting on the shelf that is all blueprinted up and ready to build on and I keep thinking a 270 Blaser shooting the 170 Berger's would make for a nice 270 build, also.

 

[Overkill338]

View attachment 158665 Hmmm.

Weatherby has designed a brand-new cartridge the 6.5 RPM (Rebated Precision Magnum). It's a non-belted cartridge with little taper and a 35-degree shoulder. Initial loads include (from l.) 127-grain Barnes LRX, 140-grain Hornady InterLock and 140-grain Nosler AccuBond.

You do realize that's what my initial post was right? Telling about the 6.5 RPM. Why are you retelling what's already been told?

 

[trappers son]

Yeah, the 195 EOL are 1.64" long. That is why I will choose a 7mm Blaser Magnum over longer cases. The case is the perfect length 2.35" for 180 gr. ALCO, and Berger Hybrids, and 151 Warner Flatline solids at 1.53 to 1.56". I am sure I can get 2925-2950 fps out of the cartridge with 195 gr. EOL, but the 180 gr Alco RBTULD ST will hold in the wind better at a G7 of .430 B.C. and at 3050 fps it will outrun the heavy Bergers without any pressure easily.

Sounds like a nice concept... I built mine in 2014 and was just looking for a project to work on with the Berger bullets in a weatherby rifle that has been in the family for a while. I love weatherby actions, the consistent norma brass and was just looking for a bit more case capacity so it would shoot fast at a low pressure. I was building it for my own needs and wants, not to compare with others.
I have always thought that a perfect case would be a short mag 91 grain case capacity and a long thin walled neck... Too bad most of the people in the big game can't see the potential for a case like that built by a high end brass company. With the trend going towards high weight high bc you would think it would be a no brainer...
Weatherby ran the wrong way in my opinion. They should have built a gun and case around the high end heavy for caliber bullets instead of making a case run around a lighter shorter action.
They will have issues with short mag boxes with custom reloads.
6.5 is not an efficient long range cal...
And a rebated rim is just a nosler knock off...

 

[Rich Coyle]

Huh?

 

[rokstockrangtang]

I do believe that wichester had a rebated case 50 years before nosler.

 

[DJ Fergus]

Sounds like a nice concept... I built mine in 2014 and was just looking for a project to work on with the Berger bullets in a weatherby rifle that has been in the family for a while. I love weatherby actions, the consistent norma brass and was just looking for a bit more case capacity so it would shoot fast at a low pressure. I was building it for my own needs and wants, not to compare with others.
I have always thought that a perfect case would be a short mag 91 grain case capacity and a long thin walled neck... Too bad most of the people in the big game can't see the potential for a case like that built by a high end brass company. With the trend going towards high weight high bc you would think it would be a no brainer...
Weatherby ran the wrong way in my opinion. They should have built a gun and case around the high end heavy for caliber bullets instead of making a case run around a lighter shorter action.
They will have issues with short mag boxes with custom reloads.
6.5 is not an efficient long range cal...
And a rebated rim is just a nosler knock off...

I personally like 7mm the best but since I have 6 rifles in 284 cal, I decided on 264 cal. I already have a 30 cal. While I do think the 7mm beats the 6.5 in every way, the 6.5 is next behind 7mm & 30 cal for efficiency.

 

[Overkill338]

I do believe that wichester had a rebated case 50 years before nosler.

There were Rebated rims on RUMs and WSMs 15+ years ago too. The Nosler line wasn't even thought of.

 

[DJ Fergus]

I do believe that wichester had a rebated case 50 years before nosler.

Rebated cases been around for a while. 35 Remington for example, I don't know how old 35 rem is but it's early 1900s I believe. I can't really say anything good or bad about rebated cases cause I haven't tinkered with any. It must not be too bad cause the 284 win has it's fair share of match wins.

 

[rokstockrangtang]

How many grains will this new case hold?
Might have to get a hold of Dave at ptg and get a print.

 

[Overkill338]

How many grains will this new case hold?
Might have to get a hold of Dave at ptg and get a print.

82.5 h2o

Read the article I posted in my OP.

 

[DJ Fergus]

How many grains will this new case hold?
Might have to get a hold of Dave at ptg and get a print.

He's got a cip & custom option reamers for it posted on his site. $229 base price. Seems a little stiff on price.

 

[rokstockrangtang]

$90 more then my martini and haagen reamer.

 

[Lefty G-gear]

You do realize that's what my initial post was right? Telling about the 6.5 RPM. Why are you retelling what's already been told?

It became news to me... and a knee-jerk reaction
Any YouTube hunts with it?