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chronograph results for .300 wsm

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/13/2009 at 22:00
billyburl2 View Drop Down
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Borrowed a friends chrony today. The load test was 178 gr. moly coated A-max's over 64.5 gr. of IMR 4350 with CCI 250 primers in once fired winchester brass. Temp was about 80, my elevation is about 3200 ft. With a string of 8 rounds fired hi vel. was 2977fps, lo was 2931fps, and the average was 2957fps. While this load has been very accurate, was wondering if I should try for more velocity? Oh btw, the rifle is a Savage model 11 with a 24" barrel
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/13/2009 at 22:28
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What kind of groups were you getting?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/13/2009 at 23:17
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Best  group so far was about 5/8" untill I had a called flyer that spread out the group to about 1".
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/13/2009 at 23:41
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hotter loads helps some guns, and hurts others.  If you are showing no pressure signs, you can keep going hotter.  I would play with the seating depth of the bullet a little.  Get it closer to the lands and see what happens.

5/8" is a pretty good group, especially if it is just for hunting. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/13/2009 at 23:59
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The same buddy that loaned me the chronograph also had the new hornady manual. There max charge for 180 class bullets and IMR 4350 is 66.5gr., while all other info I had seen stopped at 65gr. So it kinda got me wondering. I will probably go up .5 grains, the work up with .2gr increments from there.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/14/2009 at 06:34
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  Just watch for velocity readings that aren't consistant with what you've gotten so far like a sharp increase or even a slight drop.  Nosler shows the .300 WSM maxed out at 3024 w/65gr of IMR4350 so I wouldn't expect much more. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 21:41
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Each individual rifle has its own tolerance point for max loadings. 66.5 grains can be worked up too in one rifle showing no pressure signs, while another may show some pressure signs at 66.5 grains, which would then need to be backed off by a grain or so.
 
If you see no pressure signs then increase by 1/2 grain increments. When small pressure signs are first seen, back off 1/2 grain and call that maximum for that rifle.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: June/15/2009 at 22:40
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Thank you all for the tips !
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2009 at 08:59
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I am using 66.5g of w760 and getting 3158fps @1400 ft and 78 degrees. 
The max load in Hornady is 67.5g but the top speed there shows only to be 3000fps. 
Iam getting more speed for some reason with lower loads. 
 
1/4 inch groups @100yds.
178g Hornady A-max bullets
66.5g W760
Winchester brass
Winchester WLRM Primers
COAL 2.860"
 
Rifle is a Tactical Rifle with 25 Inch heavy Barrel
Remington 700 Action
Mcmillian Stock
SS 16X Scope
Burris Xtreme RIngs
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/18/2009 at 11:39
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  What concerns more so than the charge is the velocity your getting.  Nosler got a max of 3029fps (right around Hornady's max of 3000fps) with 64gr of 760 using a 180gr bullet. With your 25"bbl you'd be expected to pick up extra fps IF Nosler and Hornady used 24" or less bbls. I'd REALLY like to see the recorded velocities as you worked up to that final load if you could.  My initial impression is that your over the top.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/19/2009 at 14:46
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Concerned me also when I saw the results. 
Iam currently lessening the powder in order to get her down around 2950fps. 
My biggest problem was bolt became sticky or harder to open. 
This was not a max load, according to Hornady's book.  I still had around 1g left before max.
I was attempting to get her speed at 2950fps...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/19/2009 at 14:52
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Darn not being able to edit.
Hornady used a 24" barrel.
And like I said, I used the same recipe as Hornady accross the board. 
I did not chrono early beacuse, I just got the chrono.
Really funny thing is, usually the loads, from the books, are slower than they say.
IDK, Just know Iam lowering the load.  I don't like the sticky bolt and that much speed aint worth blowing the gun....
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/19/2009 at 15:17
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  Your doing the SMART thing!  Do you have a chrono reading using 64 grs? 64grs is Noslers max in a minimum spec bbl and chamber which I doubt yours is.  I use to average all reliable max data I could find and use it as my max watching for pressure signs. Once I got a chrono I started to watch for unusal velocity increases or (after last yr) decreases as my powder charge was increased.  If I have neither and reach Noslers max velocity,I stop.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/19/2009 at 21:48
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Sounds good... Wink
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 06:27
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i shot 180gr bullets out of my wsm, i used like 66.7 grains of rl19 it shot pretty well with that load.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 07:11
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  I was thinking of suggesting RL-22 if 760 doesn't work out for him.  Did you chrono that load,pyro?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 08:16
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no chrono, im to cheap to buy one. in fact when i first shot my H&H a few months ago that was the first time i'd ever shot over one.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 08:20
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  And that didn't convince you to buy one?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 08:26
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it is a friend of mine, a friend whom i consider more knowledgeable than i, told me that chrono's in his eyes are the devil. curiosity killed the cat, is what his exact words were to me. he said these damn things just get you in trouble and end up costing you more money. i said why?? he said well when you get all wrapped up in speed you sometimes forget about whats really important, accuracy. i said good point, if i care to know my speeds i will shoot at his place.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 08:32
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  I guess.  I use mine for load development,and along with other ways,in monitoring pressure.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 08:33
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i guess i look for results on the paper instead of on the screen. one can never have to much info though!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 08:52
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   Thunbs Up  YEP!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 22:33
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Got out to the range today... I went from the original 66.5 to 65g.  I still was shooting at 3050fps... So I figure I will take it down to 64g to get the 2950fps I want.  Wow! this stuff is really weird... Never thought I would have to go that low...  Things that make you go hmmmmmmm....Whacko
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/20/2009 at 23:22
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Got another problem,  I was noticing that when I chambered my resized rounds, my bolt is stiff both in closing and opening.  I thought that this was pressure from the round but it isnt.  A factory round goes in and out without any problems.  Also, an unfired reload also goes in correctly.  I was noticing that RancidCoolaide had a similar problem with resized rounds.  I sent him a message to see if he could point me in the right direction but, right now, it appears that my dies are not sizing correctly. 
Would this have anything to do with the outrageous speeds Iam getting?   Brick Hit
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/21/2009 at 02:28
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It could be that your die is not set correctly in that you are not pushing the shoulder back. You may be resizing the diameter of the body correctly, but the shoulder must also be pushed back for proper "headspacing".
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