Hello from a newbie
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Post by Hello from a newbie on Mar 23, 2009 23:38:31 GMT -5
:)Hello guys.
Ive read some neat stuff on this forum alot so I finally joined it. Ive got a 209x50 Encore with a Bullberry 1.5lb trigger, locker pin with a SMI smokeless barrel and Leupold 6.5-20 EFR. The barrel 28" long with triangular fluting it also wears a boyd laminated thumbhole stock. Right now im shooting 75gr 2015 with the 300gr TSX .458 with the short harvester sabot SMI recommends. In warmer weather it tears up the sabots bad and accuracy is around 2.5" at 100. When it got colder the sabot must have stayed together because my groups shrank almost all 3 shot were touching. Any suggestions guys? Im thinking about shooting some of Hornady new bullets they released 200gr poly tip and 250 gr poly. I would like to get 2700 fps with a 250 gr bullet. Thanks in advance
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Post by Marku on Mar 23, 2009 23:40:15 GMT -5
As you can tell my screen name is Marku sorry for not posting that is the opening thread. Most forum is automatic.
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Post by Dave W on Mar 24, 2009 4:26:53 GMT -5
Try letting the barrel cool more in warm weather between shots. You could also try reducing your charge weight a grain or so in warm weather to see if that tightens the group up.
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Post by wilmsmeyer on Mar 24, 2009 4:56:16 GMT -5
You could also try about 76 gr H4198 with a 250 gr bullet and not blow sabots. This will get you the speed you want. It is my opinion from experience in my gun, that such a long wait time is not as crucial with this powder. I get by with 5 minutes regularly. Others will have different experiences regarding wait time.
I don't think my gun is unusual...it will blow sabots using N110 in book doses on a cool barrel. Since I can't explain it, I won't try. I've theorized that H4198 is just a perfect powder. I've probably shot enough of it to fire a few artillary shells. ;D
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Post by onecardchuck on Mar 24, 2009 9:47:23 GMT -5
If you hate waiting the proper time for the barrel to cool between shots you could make a barrel cooler. Search the old site and you will find a neat idea to shorten your wait times.
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Post by boarhog on Mar 24, 2009 11:00:45 GMT -5
I too am a Newbie. Reading this board has answered many questions I had, and a lot I didn't know to ask, but I would like to know something I haven't yet seen covered.
I have printed most of the load sheets and have been studying them. It seems that Duplex formulas could be used to custom tailor loads for a finiky rifle. My question is, what role does the booster powder play in a duplex load? If it primarily servs to ignite the main charge, why wouldn't most any faster burning powder (within a similar burning rate range) accomplish the same task? I have on hand: Blue Dot, 2400, IMR 4227, A 1680, IMR 3031, A 2460, and BLC-2. The various burning rate charts I have consulted would suggest that Blue Dot or 2400 could be used as a booster charge for A 1680, 3031, or BLC-2, instead of H 322?
Perhaps I have overlooked threads that have covered this subject, but I would like to know the criteria for powdfer selection in Savage ML.
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Post by chuck41 on Mar 24, 2009 15:07:47 GMT -5
I too am a Newbie. Reading this board has answered many questions I had, and a lot I didn't know to ask, but I would like to know something I haven't yet seen covered. . . . . . . . . My question is, what role does the booster powder play in a duplex load? If it primarily servs to ignite the main charge, why wouldn't most any faster burning powder (within a similar burning rate range) accomplish the same task? I have on hand: Blue Dot, 2400, IMR 4227, A 1680, IMR 3031, A 2460, and BLC-2. The various burning rate charts I have consulted would suggest that Blue Dot or 2400 could be used as a booster charge for A 1680, 3031, or BLC-2, instead of H 322? Perhaps I have overlooked threads that have covered this subject, but I would like to know the criteria for powdfer selection in Savage ML. First of all. Take any "Ball" powder immediately off of your list, also any other powder with very small granular size. Those are potentially dangerous in a rifle that uses breech plugs and vent liners. Second, there is much more to it than just burn rate to be considered for an "igniter" powder. Also the burn rate charts vary considerably depending on whose you read and might lead you to unknowingly pick dangerous combinations. The booster powder in a duplex load is designed to assure reliable ignition and brings the pressure up quickly for slower burning, large grained main powders that are often hard to ignite by themselves. It usually comprises less than 1/4 of the total load and as it burns away provides sufficient pressure for the main powder to burn well and maintain that pressure longer resulting in higher velocity without excessive pressures. A number of people have found that they get their best accuracy with well-tuned duplex loads. As an igniter/booster it is hard to find anything that works better than the three factory recommended powders; A5744, 4759, and N-110. They all are very easy to ignite and perform well as a single powder or as a booster. Some of your "fast burning" shotgun and pistol powders are actually quite a bit harder to ignite than these three. (Unique for example) I have no experience with blue dot or the other powders you listed. I have occasionally used some shotgun/handgun powders for VERY light (for us) loads using load data for .45 Colt, .45 ACP, 44 Mag and similar. None of them were ever very accurate, all were extremely anemic loads and some often failed to fire consistently. Just being a fast burning powder certainly does not mean it will ignite easily in our large caliber guns with a breech plug. You are much better off using the proven loads that others have found satisfactory at least initially. You can find a bunch of that information on this board and it avoids the risk to yourself and your rifle of experimenting with strange unproven powder combinations. I highly suggest you get some of one of those three factory recommended powders. I use 4759 because that is the easiest of the three for me to find locally and it has worked fine for me both as a single powder with the 50 and as a igniter powder for the 40. If you want to try some duplex loads, you have at least a couple powders on hand that some other folks have used for the main powder and you can likely find their load data on this board.
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Post by boarhog on Mar 25, 2009 11:18:39 GMT -5
Chuck41, thanks for your reply. I certainly intend to heed your advice to start with the 3 basic powders. At this time, there is no N110 available from the suppliers I regularly use, but I have gathered a pound or two of 4759 and H-4198, along with various MMP sabots. I plan to order a selection of the Harvester CR sabots also. That should be plenty to keep me busy, given my work schedule.
I am hoping to be lucky enough to find a load that will give acceptable accuracy with one or two selections of the several hundred .430 bullets I have on hand. From what I have read on this board, that may be unlikely, but I am not looking for loads that ignite the grass all the way out to 200 yds.
Thanks again for your good info and advice boarhog
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