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Old October 21, 2011, 10:33 PM   #1
Cary
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Favorite Powders for .243 with 100gr. Bullets

I inherited a Ruger M77 Mark II in .243 from my deceased father-in-law. I started reloading for it yesterday using some H414 that I already had on hand. I used Dan Newberry's Optimal Charge Weight method today and came up with a load combination that looks promising using the H414. I will do some tweaking on that load to see where it leads me. I'm using Remington PSPCL 100 gr bullets. I also have some Varget on hand I may try as well. What powders work good for you in the .243 using 100 gr. bullets? I'm predominantly a target shooter looking for accuracy and something fun to shoot. Thanks for your help.
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Old October 21, 2011, 10:47 PM   #2
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Haven't tried 100 grain bullets, but I have excellent luck with IMR 4064 with 90 grain Bergers.
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Old October 21, 2011, 11:46 PM   #3
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I use Bullseye Powder. With 55 Grain Bullets. 55gr Has more speed then a 100gr. As well, as the same ft/lb.
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Old October 22, 2011, 12:22 AM   #4
emcon5
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Quote:
I use Bullseye Powder.
You sure about that? Bullseye is a good pistol powder, and way too fast for a .243.

Quote:
With 55 Grain Bullets. 55gr Has more speed then a 100gr. As well, as the same ft/lb.
That is pretty much meaningless. 55gr .243 bullets are all varmint bullets. Remington 100 gr. PSPCL 100 is a good big-game bullet.
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Old October 22, 2011, 12:27 AM   #5
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40.0 grains of imr / aa #4350 plus a 100 grain hornady / sierra / nosler with a standard large rifle primer, is powerful "ju-ju" for deer. Velocity will be approximately 2950 for 22" barrels. Have been using this combo for almost 40 years, with much success.

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Old October 22, 2011, 05:00 AM   #6
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My 243 likes H-414 ,4064 & 4350 in this order with the 100 gr bullets .


Just got the mould I`ve been looking for for a yr. almost & gonna go lead with the 243 !!!
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Old October 22, 2011, 05:02 AM   #7
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I use Reloder 22 with 100 grain bullets.
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Old October 22, 2011, 06:31 AM   #8
TheNatureBoy
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I've done well with IMR 4350 and 4064 under a 100gr pil. Haven't hunted with H414 yet but loaded some and took it to the range and shot a tight group.
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Old October 22, 2011, 08:47 AM   #9
Rifleman1776
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H414
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Old October 22, 2011, 08:54 AM   #10
Jim243
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First congratulations on the inheritance and condolence to you and your wifle on the father-in-law.

On bullets over 55 grains (unless for special applications) my powder of choice is Hodgdon's H-4895. I have also used IMR-4350 for that caliber, but I find that H-4895 gave more consistant results.

This is one of the personal choice items since there are a lot of good powders that can be used. It has always given me good results so it is my personal choice.


Good luck
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Old October 22, 2011, 09:51 AM   #11
Cary
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Thanks for the replies. When this thread has run the course I will print it off and keep it for reference in my load notes. As I mentioned, I already have the H414 and Varget on hand not being used for anything else. H414 looked to be listed in several locations as a good contender so that was why I started with it. I got a good price on the bullets so thus the Remington 100 gr. PSPCL. H335 is another powder I have on hand I'm not using and may also see how it works in the .243. As a reloader I like to experiment with different combinations of bullets, powders, and other variables associated with this hobby doing it in a safe manner.
GP100man-I cast for all my lever guns and they haven't seen a jacketed bullet for quite some time. I don't plan to use cast in this .243 but would be very interested in your results as I am all things casting related.

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Old November 7, 2011, 11:05 AM   #12
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I have been using 43.8 gr of H4831 behind Hornady 100gr BTSP with Winchester brass and Federal #210 primers with pretty good success.
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Old November 7, 2011, 12:41 PM   #13
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Varget is an excellent and usually a very accurate powder. It may be better for accuracy loads at lower load density, while the 414 being a ball powder should be better with pretty full power loads. Both powders are a little fast for top velocities in .243.
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Old November 7, 2011, 02:56 PM   #14
William T. Watts
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H4831, IMR7828, IMR4350 in this order with 4350 used with the lighter bullets. William
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Old November 7, 2011, 04:58 PM   #15
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Two loads work really good and were actuall INTERCHANGEABLE which I have never seen in my reloading experience of 25 hrs+

Hodgdon H4530 at 40 grs even and hodgdon hybrid V 100 - I'll have to verify the charge on that one and re-post. I have some test loads with RL17 that I have not shot yet

Looking at case proportion to bullet size you will find that it mimics properties of a large magnum in terms of it liking slow powders for bullets in the 90gr + range. I tinker all the time because I enjoy it and the gun is fun to shoot. I think 4895 will be too fast for the 100 gr and may yield too high of presure in relation to the resulting velocity. Recall that pressure is what burns barrels - if you can get an accuracy round with higher velocity and less pressure your barrel will live a lot longer.
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Old November 7, 2011, 09:48 PM   #16
Cary
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Thanks for the information from all of you.

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Old November 9, 2011, 08:49 AM   #17
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4320 & 4350

IMR 4320 and 4350 have always worked well for me in two .243s. The 100 grain bullet is very effective on deer sized game. Don't let anyone tell you that a .243 is too light for deer.

Also, stick with recommended loads. I've never ever seen any load published that puts Bullseye pistol powder in a center fire bottle-necked rifle cartridge.
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Old November 9, 2011, 10:01 AM   #18
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Try RL-17. It tends to work well with bullets that are towards the heavy end of the spectrum for a particular caliber.
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Old November 9, 2011, 10:06 AM   #19
old roper
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In the 243 I've always used IMR-4350 and IMR-3031 with 80gr to 100gr bullets. I've been shooting little IMR-4007ssc just need to shoot it more will do that after elk season.

I started shooting IMR-4007ssc in a 243AI and I was real surprised with the velocity over IMR-4350 accuracy was equal.
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Old November 9, 2011, 11:13 AM   #20
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I've found IMR 4320 works the best for 100 gr bullets and IMR 4895 for lighter bullets. IMR 4350 was OK but nothing spectacular. IMR 4350 worked best in .30-06 180gr loads.
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Old November 10, 2011, 10:12 AM   #21
Cary
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Thanks to all you guys for your input on this. I have printed this off and put in my load notebook for future reference.
Cary
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Old November 10, 2011, 10:52 AM   #22
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IMR7828. Great velocity and great case fill.

Who the heck said Bullseye? lmao
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Old November 10, 2011, 11:32 AM   #23
Mike Irwin
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I've not loaded for the .243 for some years, but when I did I used IMR-4064 for all bullet weights for it.

Got very good (sub half inch) groups at 100 yards.
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