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Anyone try Reloader 17 yet?

 
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  #22  
Old 07-04-2009, 12:12 PM
gbp gbp is offline
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Join Date: Aug 2006
Location: California
Posts: 227
Re: Anyone try Reloader 17 yet?

I tried it in a 280 but never got around to chrono-ing it as the groups were not to my standards no matter what bullett i used
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  #23  
Old 07-05-2009, 04:41 PM
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Join Date: Dec 2005
Location: Tucson Az
Posts: 1,267
Re: Anyone try Reloader 17 yet?

Here is the first of a few tests with a 7 Rem Mag and RL-17.

First the specifications on the rifle:

24" Remington SS takeoff barrel chambered for 7 Rem Mag, setback a thread and rechambered to fit the model 700 action. The reamer is unknown to me owned by Harry Lawson Co. (when I rebarrel again I'll use my new Pacific Tool and Gauge reamer which was recently used for a 30" barrel project)

The barrel has 514 rounds through it before today's test.
Win brass fired 3 times, partially FL sized with RCBS die
168 Berger VLD,moly coated, seated .020" into rifling
Redding comp seating die
Fed 215 primers
RL-17

Temperatures ranged from 85-88 degrees F
CO2 was used to cool down barrel to ambient temp every two rounds
CED M2 Chronograph 10 feet from muzzle


Worked up charges in 1 gr increments:


60 gr ave 2895
61 gr ave 2968
62 gr ave 3011
63 gr ave 3059
64 gr ave 3090
65 gr ave 3157 two of four cases had slight bolt lift and slight shiny extractor mark

The most accurate load was the 63 grain load. It had three of the four shots in a group of .416" with the fourth shot opening it to 1".

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Back in November 2007 I tried the moly coated 168 VLDs with RL-22 and RL-25 with this same barrel and components:
RL-22 yielded the highest velocity of 3065 with 70 gr and no signs of pressure.
Pressure showed at 70.5 grs.
temps in the 60s
Most accurate load which was NOT very accurate was 69 gr of RL-22 ave velocity 3015
Do not know seating depth, pre stony pt gauge

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RL-25's most accurate load (also in Nov and not very accurate) was with 70 gr ave velocity 2895

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I did tweak the seating depths with both RL-22 and RL-25 with poor results. Seating depths ranged from kissing the rifling (small rifling marks seen after steel wool polishing, again no stony pt gauge) to a jump of .040". Since this time Berger has suggested awide range of seating depths some of which are far larger than .040" Perhaps those loads could be tweaked into accuracy but I won't bother now.

-------------------------------

Tomorrow I will try some 140 nosler ballistic tips and will report back.
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  #24  
Old 07-05-2009, 05:53 PM
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Join Date: Oct 2008
Location: Bryan, Tx
Posts: 284
Re: Anyone try Reloader 17 yet?

What CO2 setup did you use to cool the barrel AZ shooter?
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  #25  
Old 07-05-2009, 06:39 PM
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Join Date: Dec 2005
Location: Tucson Az
Posts: 1,267
Re: Anyone try Reloader 17 yet?

I fashioned my own a few years ago..I went in to the welding supply shop that supplied my high school where I was a vocational teacher for 18 years and they took the time to help me try several regulators for the proper flow. I bought a tank and a small hose that slides into the chamber. It is amazing how fast a barrel can be cooled down. It is somewhat pricey to fill those tanks but for a fast no hassle load workup nothing touches it.

I shot 24 rounds in 1/2 hr today.

I can supply you with the model number of the regulator if you like.
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  #26  
Old 07-05-2009, 07:13 PM
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Join Date: Oct 2008
Location: Bryan, Tx
Posts: 284
Re: Anyone try Reloader 17 yet?

yes, I am curious about your setup. How long does it take to cool between shots? Wonder how it affects tempering etc?
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  #27  
Old 07-05-2009, 07:21 PM
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Join Date: Jan 2007
Location: Grafton, WI
Posts: 591
Re: Anyone try Reloader 17 yet?

I love it, with my 'short' pistol barrel(17.5'') its awesome! its chambered in 7wsm. today I had a 10 round ladder test loaded up. previously with 4831sc I was able to get 2650 before I saw pressure signs, today with r17 I shot all 10 and I am pushing a 168smk at 2840. that's without any pressure signs! so I have to go back to the bench and see how fast I can get them going... minus two I pulled they are all well within 2'' @ 200 yards.
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  #28  
Old 07-05-2009, 07:41 PM
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Join Date: Dec 2005
Location: Tucson Az
Posts: 1,267
Re: Anyone try Reloader 17 yet?

Getting a boost like that in a short barreled 7 WSM is great! The 7 rem mag and the 7 WSM are almost identical in capacity. That H4831 is just too slow for that short barrel, has to be the big difference.

--------------------

I can cool the 7 rem mag after two shots in around 20-30 seconds. I had done extensive tests with several barrels and a thermometer. The barrel can be shot cool, not cold, with no ill effects to accuracy. Letting the barrel cool normally, cool fast and then warm up to ambient OR cool and just shoot give the same results. I define cool as slightly below ambient not more than 10 or 15 degrees.

As for changing the metal no way! There is no moisture either...CO2 prevents it. I suppose some water vapor could condense on the inside and outside if you let it get really cold in a humid environment.... we have not seen any evidence of moisture inside or outside with some cooling.

I hope the Obama team doesn't read about us using CO2. There are four of us that have this setup. Say...no wonder it is hotter the last few summers. It is my fault!!!
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