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Quote: As usual, Hot Core has no facts, no physics, and no data to back up his unfounded assertion. | ||
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One of Us |
Quote: In the absense of pressure measuring equipment I've found that a chronograph and a blade micrometer used just ahead of the extrtactor groove are good indicators of real pressure. There has been many loads I've found that I couldn't begin to duplicate.....and finally had to believe they was just pure mythology!!!! | |||
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wanna know what velocity a round should get in a bullet weight take ANY reloading manual SUM the velocities obtained by all powders at the top load, Divide by the number of powders and THATS what the round "will do"... Pick a middle load that comes close (slightly over if you HAVE to) in this case, that's what, 2786? if you HAVE to have top loads, and won't settle for less, go up TWO cases jeffe | |||
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It's real easy to get 2900 fps with that 180, or even 3000. I do it all the time with my 300 WSM. My 300 win mag will do the same thing. Why do people see the reason to push the limits when it is much safer to just buy a bigger gun. If I want to shoot a 3006 or 308 I just download the previously mentioned rifles. They are all just rifles that use different sized brass cylinders to hold the powder. | |||
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When have you ever seen the bolt come out of a rifle?, I'll bet not. Why then would you say that the bolt thrust is the most important?. It it is important, how do you measure it?. Take Care! | |||
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The WSM at 3000 is loaded about as hot as an 06 at 2900 , and has much greater bolt thrust to boot . The bolt thrust is what we should really be concerned with not just simple PSI numbers...... | |||
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No irv , I've not seen a bolt blow back out of an action . Plenty of folks have set back locking lugs in marginal actions though . Actual thrust against the locking lugs is where the rubber meets the road in my opinion . If you are worried about raw total psi blowing out the chamber walls , the 06 case wins on that score too . Thicker chamber walls = greater chamber strength . | |||
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I think it's important to note that THE BRASS was the variable that showed or didn't show high pressure.....NOT the firearm he was using. I realize ea gun is different and that has to be taken into consideration but I want people to be aware that just because brass isn't showing pressure DOES NOT MEAN THAT IT'S NOT THERE AND IT COULD VERY WELL BE EXCESSIVE. Seems like the chronograph could very well be the tool to use to judge pressure if we don't have "real" pressure testing equipment. | |||
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one of us |
Of late theres been a bit of a heated discussion in relation to velocities/pressures in the 06 ...i think it was my post about Sam Fadela obtaining extremley high velocities ...over 2900 fps with 180 gn proj which fuelled this i did mention that i will be doing some pressure testing with the 06 and the various avaliable powders ....i just had some preliminary testing done to get a bit of a feel for vel/pressure so i can have a starting point and a finishing point as far as loads go.....i just posting this more for intrests sake for those that are intrested the pressure gun in not the type that has a glued on strain gauge but a transducer which is screwed into the barrel with a full and complte lab set up ..the transducer set up is far more sensetive than the strain gauge set up This set up has a new border barrel and a universal reciver 180 gn nosler part 57 GN HOG 2758 62 400 57 GN IMR 2796 63 400 57 GN N 204 2801 64,200 60 GN R 19 2757 59 400 61 GN H 4831 S/C 2716 61,100 61 GN R 22 2786 59100 61 GN MRP 2828 61300 61 GN VV 560 2800 63,800 61 GN WXR 2809 62500 180 GN BARNES TSX 57 GN H 4350 2751 61,400 61 GN WXR 2853 63500 200 GN NOSLER PART 60 GN WXR 2689 64,200 60 GN VV560 2641 61300 60 GN R 22 2659 60400 61 GN VVN165 2673 61,400 | |||
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SORRY GUYS the first powder is h 4350 and the second powder is imr 4350 | |||
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I take it that your using a 24" barrel? | |||
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SLOW HAND yes 24 inch barrel 1 in 10 twist daniel | |||
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Quote:Oh yes, Kracky's post reminded me - the above data only applies to that "one" specific barrel in that receiver. Use a different rifle and components and your Pressure might be lower, the same or higher that what has been seen above. That is why it is important to always Develop Loads for your own specific firearm and not just randomly pick an arbitrary value from any Manual. HSGS = Reloaders Pyrite(aka Fool's Gold) | |||
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Quickload has two Nosler partitions; SP 16331 and PP 25396, I assume you used the former. Quickload thinks that if you increase the powder charge from 61 gr of WXR to 62 gr, the density would increase from 106.3% to 108.1%, the pressure would increase by 3131 psi, and the velocity would increase by 51 fps. This would change your results to 66,631 psi and 2904 fps. With a different change, Quickload thinks that if your barrel were 26 inches long, your velocity would increase by 53 fps, for 2906 fps. | |||
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M 98, that is interesting data. No load broke the 2800 fps mark within 60,000 psi. I've been telling people for years that if your getting 2800 with a 30-06 your more than likely running at high pressures. Looks like I'll have to drop that figure to 2750 fps now! | |||
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CLARK ...i think you may have got things mixed up...take another look at the data with a charge of 61 gns of WXR the vel is 2809 with the 180 gn NOSLER PARTITION spitzer @psi 62500 with the 180 gn BARNES TSX velocity is 2853 @psi of 63400 daniel | |||
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SLOWHAND i think NORMA MRP is about the onley powder you may be able to do it with ....but generally speaking you are right its hard if not impossible to get over 2750 fps and keep under 60,000 psi with another barrel we used i think i mentioned it in another post we got 2750 fps at a psi of 60,000 with 57 gn of H 4350 but then i guess it every bodys own choice what vel/pressure they want to load there rifle to....personally i cant see anything worng /dangerous to run the 06 at 2800 plus in strong bolt action rifles .....it seems odd that its okay to run the 270 at psi of up to 65,000 but the moment you get the same rifle and have it in an 06 chambering you can are limited to 60,000 psi.....i guess its called common sence but i think that has been dimmed by lawyers as i said in my opening post its onley a guide regards daniel | |||
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M98, You are right. My eye followed the skipped lines as separator. My Quickload has three Barnes 180 gr: X BT, X S, XLC BT, and XLC S. There is no TSX. I will try harder. If look at the "61 GN R 22 2786 59100" If the charge were increased 2 gr, the pressure would go up 6634 to 65734 psi, and the velocity would go up 102 fps to 2888 fps and density would go up from 108% to 111.6%. | |||
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Quote:Ah, a Pressure device that can actually give some "worthwhile" data. Thank you M98. Always dislike seeing people PT Barnumed into thinking they can get anything of value from the Home Strain Gauge Systems. HSGS = Reloaders Pyrite(aka Fool's Gold) | |||
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Don't know how many of you guys have Stan Watsons book named "A Handloaders Odyssey". He was a fan of the 30-06 and did a ton of pressure testing on it. He campared many wts of bullets, powders, bullet brands, cases. He experimented with primers, case brands, seating depths, and temperatures. It is a wonderful book and if you are into shooting you should own it. MY POINT IS...... that the work that you have done so closely mirrors his results it is almost scarey. Many of your pressures are within 2,000psi of his reports. Much of his testing was done with rem bullets and he later found out that identical charges of powder with a partition was good for a 3,000 psi increase. Anyhow you have helped validate the accuracy of his work and I can GUARANTEE that his vast work validates your results. Stan's work with two different guns also proved that 2750-2775 IS THE PLACE TO STOP when working with 180 grain bullets in the '06. | |||
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BTW--for you guys that just have to "hot rod" the 30-06. Stan found that he usually saw ejector marks at just under 73,000psi. On some brass it showed up at just under 70,000 BUT HE ALSO HAD a batch of brass that showed no problems until just under 80,000 psi. How many times have we seen people here on the forums posting they stopped when they saw ejector marks and then backed down .5 grain???? Just good "food for thought" ---if you want more gun buy more gun--Leave the '06 what it is---slight gains in velocity don't mean "zilch" in the real world of hunting. | |||
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I have Stan's manual as well. Yes it is interesting to see that the two pressure systems produce results that are that close despite the propoganda HC likes to spread. SAAMI seems to think this is the case as well, considering they have approved the SG systems for commercial use. HC, you better give them a call and tell them you know better. Turok | |||
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