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#6985473 - 10/19/12 09:57 AM Tried RL-33 with a 300 RUM
Azshooter Offline
Campfire Guide

Registered: 01/17/02
Posts: 2944
Loc: Tucson, Az.
Wasn't going to do it this close to the hunting season but got restless.

Had a okay load with H1000 and Berger 230 gr target hybrid. Used 88.5 gr for vel of 2860 fps. Load is close to max.

The barrel was a 24" rem takeoff in 300 win mag. I machined it to fit a push feed model 70 and used a PTG reamer.

Used the same components with same seating depth just substituted RL-33. Started with 90 gr and worked up. Temperatures were 85-90 degrees. Here are the results so far:

90gr 2665
92gr 2745
94gr no reading cardboard shades moved had to wait for next ceasefire to adjust
96gr 2875
98 gr 2925
100gr 3001

No signs of pressure, no bolt lift issues, primers look good etc. Will start when range opens and temps are in the low 50s. Will chrono the 100 gr load again for comparison.

-------
I went out again today to continue the 300 RUM testing with RL-33 and the 230 Berger target hybrid:

Shot the 100 gr load this morning in 60-70 degree weather. The average velocity for four shots was 2975 fps. This compares pretty close to yesterday's two shots averaging 3001 at 85-90 degrees. Will need more rounds to conclude if the powder is temp sensitive as well as cooler mornings. Az just won't cooperate with cooler weather yet.

Continued with more powder:

101 grs 2983 fps This is the first increase that didn't show a 50-70 fps increase in velocity. It would appear that there is nothing more to gain by increasing charges

102 grs 3016 had a tiny amount of bolt lift resistance.
Didn't try any hotter loads.

For my rifle 100 gr is the max I'll shoot. It was the most accurate too.

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CI16728
#6988013 - 10/20/12 07:18 AM Re: Tried RL-33 with a 300 RUM [Re: Azshooter]
RTSJ Offline
Campfire Regular

Registered: 12/16/09
Posts: 899
Loc: SW Pa.
What kind of accuracy?

Roy

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#6988409 - 10/20/12 09:58 AM Re: Tried RL-33 with a 300 RUM [Re: RTSJ]
hunter5325 Offline
Campfire Regular

Registered: 01/20/07
Posts: 1279
Loc: Meridian, ID
Interesting, wonder what it would do for 180's compared to Retumbo....prob shows more benefit with the heavies
_________________________
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#6988549 - 10/20/12 11:04 AM Re: Tried RL-33 with a 300 RUM [Re: hunter5325]
Enrique Offline
Campfire Guide

Registered: 03/27/01
Posts: 3919
Loc: Mammoth AZ USA
Az,
What time were you at the range? I was at pima around 1100.
_________________________
Enrique O. Ramirez
CLAN OF THE BORDER RATS - Member

"..faith is being sure of what you hope for and certain of what you do not see.." Hebrews 11:1

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#6989095 - 10/20/12 03:32 PM Re: Tried RL-33 with a 300 RUM [Re: Enrique]
Azshooter Offline
Campfire Guide

Registered: 01/17/02
Posts: 2944
Loc: Tucson, Az.
Accuracy? If I did my part the bulletholes would kiss each other. Going out sometime during the week for final sightin.

I have no idea if RL-33 will help with a 180. Most likely run out of powder space first. Only way to know it to try it. Doubt you'll get to signs of pressure.

Enrique..I opened up the place and usually leave by 9 or sometimes 10am. We just missed each other.

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#6989517 - 10/20/12 06:26 PM Re: Tried RL-33 with a 300 RUM [Re: Azshooter]
kraky111 Online   happy
Campfire Guide

Registered: 10/30/04
Posts: 3677
FWIW...The new quickload has re33 in the library. Looks like it's got the speed pretty close but pressure looks a bit scary. I know the rum seems to get run pretty hard before pressure shows. This is just something to look at:
Html:
 Cartridge          : .300 Rem Ultra Mag
Bullet             : .308, 240, Sierra MK
Cartridge O.A.L. L6: 3.598 inch or 91.39 mm
Barrel Length      : 24.0 inch or 609.6 mm
Powder             : Alliant Reloder 33

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   87    86.40   2553    3329   46551  14266     98.0    1.557
-09.0   88    87.36   2584    3410   48271  14406     98.3    1.530
-08.0   89    88.32   2615    3492   50054  14538     98.7    1.504
-07.0   90    89.28   2646    3575   51903  14661     99.0    1.479
-06.0   91    90.24   2676    3658   53820  14775     99.2    1.454
-05.0   92    91.20   2707    3743   55808  14881     99.5    1.429  ! Near Maximum !
-04.0   93    92.16   2738    3827   57870  14977     99.7    1.405  ! Near Maximum !
-03.0   94    93.12   2768    3913   60009  15064     99.8    1.382  ! Near Maximum !
-02.0   95    94.08   2798    3999   62228  15141     99.9    1.358  ! Near Maximum !
-01.0   96    95.04   2829    4086   64532  15208    100.0    1.336  !DANGEROUS LOAD-DO NOT USE!
+00.0   97    96.00   2859    4173   66924  15265    100.0    1.314  !DANGEROUS LOAD-DO NOT USE!
+01.0   98    96.96   2888    4261   69408  15316    100.0    1.292  !DANGEROUS LOAD-DO NOT USE!
+02.0   99    97.92   2918    4349   71988  15366    100.0    1.270  !DANGEROUS LOAD-DO NOT USE!
+03.0  100    98.88   2948    4438   74668  15413    100.0    1.249  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    99.84   2977    4527   77454  15460    100.0    1.229  !DANGEROUS LOAD-DO NOT USE!
+05.0  102   100.80   3007    4616   80352  15505    100.0    1.208  !DANGEROUS LOAD-DO NOT USE!

Results caused by  10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba     97    96.00   2987    4557   82212  14660    100.0    1.202  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    96.00   2666    3630   52029  15373     96.6    1.465

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#6989524 - 10/20/12 06:29 PM Re: Tried RL-33 with a 300 RUM [Re: kraky111]
kraky111 Online   happy
Campfire Guide

Registered: 10/30/04
Posts: 3677
forgot to mention ql doesn't have the 230 bullet in the library...I used a 240mk but changed the wt to 230 for the calc.

Also.... a long throat in the barrel could easily relieve pressure by 8k or more. Not sure how you have it set up.


Edited by kraky111 (10/20/12 06:30 PM)

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#6994480 - 10/22/12 01:13 PM Re: Tried RL-33 with a 300 RUM [Re: kraky111]
Azshooter Offline
Campfire Guide

Registered: 01/17/02
Posts: 2944
Loc: Tucson, Az.
Thanks for looking up RL-33 in quickload Kraky,

There are some differences between the 230 hybrid and the 240 sierra. I have both and the hybrid has alot less bearing surface. I am happy with the results I am getting and will run with it. There is a jump to the rifling as I am loading so it fits the wyatt's mag box. Never bothered to measure the jump though. Why bother when the hybrid will shoot pretty much anywhere you seat it.

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