300rum ruger #1 165bst and chrono??

[w8n4rut]

working on load development on sat. and put up the oehler. started with 98gr retumbo and worked up to 105, at 105 had sticky extraction and loose primer pockets. found best load at 101 but decided to run 3 of the 105's through the screens,printer looked like this:

1-3720
2-3692
3-3706

can this be right?? barrel is #18 light varmint krieger. :shock:

 

[SJB358]

Just looking at the Retumbo data, that looks really fast. I would have expected around 3500 or so. How long is your barrel? Scotty

 

[w8n4rut]

barrel is 27''

 

[SJB358]

That does seem to be screaming.. What is your load running at 101gr's? That should just about be a laser with a 165. Is it your deer rifle or do you have other plans for it? Scotty

 

[w8n4rut]

just got it back from gunsmith. deer rifle (but not with 165 ballistic tips last i used the chrono was my m77v 25-06 everything was up to par 100bst at 3300fps.

 

[SJB358]

Maybe it is right. That does seem mighty fast. Either way, I would imagine your 101gr load is pretty quick as well. What bullets are you going to use to hunt with? I imagine something pretty tough to stand up to those speeds. Scotty

 

[w8n4rut]

i am going to try and work up a good load for the 180-200 AccuBond for hunting.

 

[FOTIS]

Normal loads for the 300 Rum with 26" tube run about.....

200 3100 fps
180 3300 fps
165 3400 fps.

It is easy to get fooled with pressures in the 300 RUM do to its real tough brass. People are usually running 70k+ psi and do not even know it.

 

[SJB358]

i am going to try and work up a good load for the 180-200 AccuBond.

Hit up Woodycreek for a good 200gr AB load for the RUM. It is VERY accurate. I think he is also running around 95gr's of Retumbo, but I will let him jump in with his actual load data.

This is one of the targets shot with that load, and I would say this is probably the worst of the groups I have seen out of this rifle. Scotty

 

[w8n4rut]

have not measured expansion but primer pockets are loose after first firing with nosler brass. so i know i am over pressure.

 

[SJB358]

have not measured expansion but primer pockets are loose after first firing with nosler brass. so i know i am over pressure.

Yeah, I would check out Brian's load. I think he is getting good case life (using Nosler's brass) with his load and man, what a performer. It has made me rethink the RUM a little. Scotty

 

[w8n4rut]

thanks, i am going to begin with 200's when they show up. i really like the 300rum and this krieger. this ruger's accuracy exceeds any bolt gun i have shot.

 

[Antelope_Sniper]

105gr is way hot

Cartridge : .300 Rem Ultra Mag
Bullet : .308, 165, Nosler BalTip 30165
Useable Case Capaci: 102.586 grain H2O = 6.661 cm³
Cartridge O.A.L. L6: 3.598 inch = 91.39 mm
Barrel Length : 27.0 inch = 685.8 mm
Powder : Hodgdon Retumbo

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.476% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-04.8 105 100.00 3283 3950 62749 11917 100.0 1.254 ! Near Maximum !
-04.3 106 100.50 3299 3987 63937 11934 100.0 1.244 ! Near Maximum !
-03.8 106 101.00 3314 4024 65153 11950 100.0 1.234 !DANGEROUS LOAD-DO NOT USE!
-03.3 107 101.50 3330 4062 66394 11965 100.0 1.224 !DANGEROUS LOAD-DO NOT USE!
-02.9 107 102.00 3345 4099 67661 11981 100.0 1.215 !DANGEROUS LOAD-DO NOT USE!
-02.4 108 102.50 3360 4137 68956 11996 100.0 1.205 !DANGEROUS LOAD-DO NOT USE!
-01.9 108 103.00 3376 4175 70279 12011 100.0 1.195 !DANGEROUS LOAD-DO NOT USE!
-01.4 109 103.50 3391 4212 71630 12025 100.0 1.186 !DANGEROUS LOAD-DO NOT USE!
-01.0 109 104.00 3406 4250 73010 12040 100.0 1.176 !DANGEROUS LOAD-DO NOT USE!
-00.5 110 104.50 3421 4288 74416 12054 100.0 1.167 !DANGEROUS LOAD-DO NOT USE!
+00.0 110 105.00 3436 4326 75848 12068 100.0 1.157 !DANGEROUS LOAD-DO NOT USE!
+00.5 111 105.50 3451 4364 77307 12081 100.0 1.148 !DANGEROUS LOAD-DO NOT USE!
+01.0 111 106.00 3467 4403 78795 12094 100.0 1.139 !DANGEROUS LOAD-DO NOT USE!
+01.4 112 106.50 3482 4441 80312 12107 100.0 1.130 !DANGEROUS LOAD-DO NOT USE!
+01.9 113 107.00 3497 4479 81860 12120 100.0 1.121 !DANGEROUS LOAD-DO NOT USE!
+02.4 113 107.50 3512 4518 83439 12132 100.0 1.113 !DANGEROUS LOAD-DO NOT USE!

 

[Woodycreek]

I have had great results with accuracy with 95-96 grains of Retumbo with 200gr ABs and Fed 215M primers. 96 grains grouped well but was hard on primer pockets. Recently switched to Nosler brass and the groups tightened up some more. The pic is 95 grains of Retumbo and Nosler brass with the 200gr AB going 3171fps.

 

[Guy Miner]

"95-96 grains of Retumbo with 200gr ABs and Fed 215M primers"

That's become a well regarded combination for the .300 RUM. Hodgdon's max load of 95 gr Retumbo and the 200's was recommended to me when I was messing with the .300 RUM a few years ago. Really a nice-shooting load, with a lot of thump. The big 200's seem to make a lot of sense in that big cartridge case.

Regarding the OP's 165 gr load, Hodgon recommends a max of 103 grains of Retumbo with a 165 for 3414 fps. Of course that's with a Swift bullet, not a Nosler.

Guy

 

[Woodycreek]

I tried some 180 combos but the 200 ABs made the most sense in the 300RUM. Hope to connect with an Elk next week with the 300RUM. I would also like to see Nosler make a high B.C. 220gr .30 Cal AB. HINT! HINT! :lol: