300 RUM 180gr @ 3500 from a 26" barrel?!?!

[Waffen]

300 RUM 180gr @ 3500 from a 26\" barrel?!?!

Gentlemen,

I was at the range chronographing loads yesterday and got some results that were surprising to me. I was able to get 3473,3502,3507, and 3493 from my Remington 700 Sendero in 300 Ultra.

I was shooting:
180gr Hornady SST
92gr of RL-25
Winchester WLRM
Remington Case
3.65 OAL

This was all done from a 26 inch barrel, with no pressure signs to be found. In fact I would think I could push it even higher if I wanted to. I was wondering if something like this was normal or even possible. I shot my 30-06 through the chronograph to verify that was reading in the correct range and it was. It was showing the 06 with a 165 in the 2800's range, which is where it should be.

Any ideas as to what would cause this or if I just found the holy grail of all loads for this gun?

 

[jwp475]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

I would be cautious,I worked up to 99.5 grains of Retumbo in mine and got 3426 fps with no problems,but my next lot of Retumbo could only stand 96.5 grains and got 3340 fps any Higher and I had pressure problems

 

[James Jones]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

You may have just gotten a good barrel that was chambered well. Some guns are just good shooters , I have a 300Win mag with an Obermeyer barrel that shoot alor faster than I thought that should , but thats where that gun likes to be shot.
You maybe just one of the lucky ones

 

[Eaglet]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

Waffen,
Read this link.

 

[Fiftydriver]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

It is my opinion that the 300 RUM is not a 3500 fps chambering in a 26" barrel with a 180 gr bullet. While you may not be seeing pressure signs there is one staring you right in the face, the chrono!!

I have played with the 300 RUM alot, factory rifles and full customs I have built for customers and I would say in that barrel length, 3400 fps is legit comfortable top loadings. In some cases a bit over in others a bit less with this weight bullet.

How many firings are you getting per case with this load. If you are not getting at least 4 firings without primer pockets loosening up I would say you are running to high in pressure.

It sounds like you just got a rifle that was put together well. This will hide alot of pressure signs but remember the best pressure indicator you have is your chrono. Don;t forget to heed its warnings. IF you have to ask if this is unusual because of the high velocity, there probably is a reason to tone her down a bit.

Just my opinion.

Kirby Allen(50)

 

[Waffen]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

FiftyDriver,

I am still on my first set of brass for the RUM. I probably have 10 firings on each case. I know this is a lot and I know I need new brass in the worst kind of way. Money has been tight (only 21 and just bougth a house /ubbthreads/images/graemlins/ooo.gif) and I have only been neck sizing since the first firing, so i'm not too worried about a case head seperation just yet. Although it's comming soon if I don't get new brass.

The primer pockets are loose, however this started probably 3 firings back. I will back this load off a few grains and see what the chrono says. It was accurate though, which makes me happy as can be! I've been struggling to find a load that will work in this gun, and will hold together on an animal at 3200-3300FPS velocities.

It doesn't like TSX's, Siroccos, or Interbonds so I guess I need to check out Noslers bonded lineup .

I was wondering how the SST's compare? I was under the impression this was a psuedo varmint round, or would at least act like one in a 300 RUM at close ranges?

 

[Fotis]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

[ QUOTE ]
It is my opinion that the 300 RUM is not a 3500 fps chambering in a 26" barrel with a 180 gr bullet. While you may not be seeing pressure signs there is one staring you right in the face, the chrono!!


Kirby Allen(50)

[/ QUOTE ]

+1 /ubbthreads/images/graemlins/shocked.gif

 

[longgunshooter]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

[ QUOTE ]
FiftyDriver,

I am still on my first set of brass for the RUM. I probably have 10 firings on each case. I know this is a lot and I know I need new brass in the worst kind of way. Money has been tight (only 21 and just bougth a house /ubbthreads/images/graemlins/ooo.gif) and I have only been neck sizing since the first firing, so i'm not too worried about a case head seperation just yet. Although it's comming soon if I don't get new brass.

The primer pockets are loose, however this started probably 3 firings back. I will back this load off a few grains and see what the chrono says. It was accurate though, which makes me happy as can be! I've been struggling to find a load that will work in this gun, and will hold together on an animal at 3200-3300FPS velocities.

It doesn't like TSX's, Siroccos, or Interbonds so I guess I need to check out Noslers bonded lineup .

I was wondering how the SST's compare? I was under the impression this was a psuedo varmint round, or would at least act like one in a 300 RUM at close ranges?

[/ QUOTE ]

if you can get ahold of some barnes 180gr MRX's try them. they are a~kin to the triple shocks with a poly tip, and an improved profile. im testing some right now. the initial results are promising out of my Sendero 300WM.

 

[Waffen]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

Hehe, I am intrested in the MRX however for $20 for a box of 20 they are too expensive for me. Heck TSX'es are expensive enough. Good Luck with the testing!

 

[BrandonA]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

I've been getting right around 3400 FPS with my 300 RUM and 180 Grain TSX.. using 96.5 grains of Retumbo and thats about half a grain below what I felt was a safe pressure point because at 98-100gains I found you better have deep pockets for new brass after each firing

An interesting read though since I first used RL-25 for my first run through reloading then switched to Retumbo, but never did Chrono the RL-25... interesting.

 

[azsugarbear]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

I have been having the same results in a custom 300 RUM built on a Rem 700 action. It has a 27 inch Lilja with a three groove, one-in-twelve twist rate. Good enough to stabilize the 180 gr. bullets, but nothing higher. More a hunting rig than a 1000+ longrange paper puncher.

I fired over 200 test rounds before I found one that would work. I used H1000, Retumbo and RL22. In my warm weather climate, the RL22 was too eratic. The Retumbo would produce decent velocities, but then would spike every so often to scary velocities. I stuck with H1000. I couldn't get the 165 gr. or 168 gr. TSX bullets to group well at any velocity, but I finally got the 180 gr. TSX to group inside .5 inch. However, to get there, I had to load 98.0 gr. of H1000 behind the 180 gr. TSX. The chrony ave. says 3,450 fps with a variance of 20 fps on either side. No signs of pressure yet, but I know I'm close. No sticky bolt, loose primer pockets or bright ejector markings. Primers are somewhat flat, but not much. No cratering of firepin hole. I would love to back off this some, but I've gone as low as 95.5 gr. and have not yet been able to get a sub MOA group. Can't find the next lower nodule on my ladders.

I want someone to hold my hand and tell me the load is OK and that these nagging doubts are unjustified. If not, then the next grouping will be at velocities easily obtained from a 300WM, which defeats the whole purpose of having the 300 RUM to begin with. The other alternative is to trash my TSX load data and start over again using 180 gr. or 165 gr. AB. Any advice for me?

 

[jwp475]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

I have been having the same results in a custom 300 RUM built on a Rem 700 action. It has a 27 inch Lilja with a three groove, one-in-twelve twist rate. Good enough to stabilize the 180 gr. bullets, but nothing higher. More a hunting rig than a 1000+ longrange paper puncher.[Quote

I have a 300 Rum with a 1 in 12 twist Krieger barrel and it shoots 200 grain Accubonds quite accurately..............
I am going to try some 210 Wildcats in it next...........

 

[James Jones]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

You might want to try a differant bullet setup also primers can play a major role in eratic velocity and poor accuracy

 

[Fiftydriver]

Re: 300 RUM 180gr @ 3500 from a 26\" barrel?!?!

Sugarbear,

How was the rifle put together? Was the receiver accurized before the barrel fitting?

The reason I ask is because I have fitted around 200 Lilja barrel in the last couple years or so and I have yet to have one as finicky as the barrel you discribe. Many on this board are using Lilja barrels for 300 RUMS and getting very good results right off the bat.

Just curious why your rifle is so finicky, something seems off to me there. Is it a light weight rifle?

Just curious /ubbthreads/images/graemlins/grin.gif!!

Kirby Allen(50)