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Willie T Posted - Jul 04 2017 : 19:44:13
Anybody done much with the new enduron? I just picked up a 1 lb can of 4451 to try in my 270.
15   L A T E S T    R E P L I E S    (Newest First)
Shastaboat Posted - Jul 14 2017 : 13:24:34
Willie T. I've had the same experience with all 4 Ruger 77's I have. The barrels generally make contact with the barrel channel on one side or both. Free floating and correct action tightening is generally the trick as you found too. I was able to go up to 57.5 gr of 4350 but your 55 gr load is probably the more accurate. Keep us posted on the H100V. I have a brand new 8# container of H4350 so I really don't want to go out and buy H100V but I might if it beats the accuracy of 4350 in my (2) Ruger 77 Tang .257 Roberts rifles.
Willie T Posted - Jul 13 2017 : 19:47:11
Shasta, I have it grouping with 4350. It's a lefty like me and I bought it cheap cause it shot like crap. When I took the stock off, the pressure point was making contact on one side only. I sanded it out and opened up the barrel channel. While I had it apart I did some inletting with my dremel and put a timney in it and bedded the action. 55 grains of IMR 4350 under a 130 SGK shot 3 into .586. I loaded 5 more and chrono'd them at 3014. Those five went into .597". It's a solid load. I am trying to see if I can get it up around 3100 and MOA. I can get the velocity but groups blow out to around 2". I shot the 4451 and 56.5 grains netted 3121 fps with no pressure. Group size was around 2.25" @ 100. When I can get by my LGS I may pick up some 100V. Right now it would seem the neighborhood of 3000fps is where I may end up.
Shastaboat Posted - Jul 12 2017 : 19:05:47
Willie T, Yeah the 22" vs 24" would account for the loss in velocity with same loads. That's why I think you might like to try 4064 as it is faster than 4350. I used to shoot Nosler Solid Base before they redesigned it as the E-tip. As for your Ruger 77, make sure the from tang angled screw is tight, then simply screw the back two action screws in evenly till they bottom. Also I have found that free floating the forearm generally tightens groups up.
Willie T Posted - Jul 12 2017 : 13:56:11
Shasta, thanks. More good info! It is a helpful group of shooters on this site, and as always, I appreciate all the replies. Your results mirror mine except my chrono showed velocity 40-60 fps slower across the board. Probably a function of barrel length. IMR 4064 is one of the powders I have tried. This Ruger is a stubborn old pig. It will make the velocity, but doesn't want to shoot well when it is much north of 3,000 fps so far. Sounds like budlight may be on to something worth looking into.
magman Posted - Jul 12 2017 : 12:58:35
Shot & tried all powders. Best FOR my 270 win 130gr is H4831SC-short cut. Same ragged hole at 100yd and groups in 1/2" 250 yd. Shoots all 130gr bullets in same group. Best bullet is Nosler! E-Tip & Barnes shoot the best. Keep that barrel clean, use a foam cleaner & Clean clean clean it!
Cheap, Fast, Good - You only get Two Of The Three!
Shastaboat Posted - Jul 12 2017 : 06:48:36
Willie T, you might want to try IMR 4064 in your 22" tube and see how it does.
Shastaboat Posted - Jul 12 2017 : 06:45:19
I haven't shot my .270 Win in probably 8 years but my data hasn't changed. Shooting Nosler 130 gr solid base, Speer 130, or Sierra 130 gr bullets.
Mauser Mark X, 24" barrel the following loads were tops with excellent accuracy.
57 gr of IMR4350, 3146 fps; 51.5 gr of IMR4064, 3175 fps; 62 gr of H4831 using a drop tube to get the powder into the case and then compressing that gave me only 3051 fps;

In a Savage 111. 62 gr of MR3100 gave me 3212 fps; 58 gr of Data 85 gave me 3123 fps; 57 gr of IMR4350 gave me 3197 fps; 62 gr of H4831 gave 3058 fps.

All of these loads were max for my load development and should be approached from several gr. below except for the H4831 loads. You just can't cram enough of that powder into a .270 Win case to show max pressure.

62.5 gr of H4831SC gave us 3127 fps in Budlight's 24" .270 Win.

Based on my prior load development 4350 would be the powder I'd choose for .270 Win but the H100V might beat it out in the velocity issue and do as well in accuracy. Budlight gave me a lb. of that powder to try on some other calibers as it is supposed to be very close to the 4350's in burn rate. I have found that to be the case. And as a ball powder it meters much better than 4350. I haven't tried it in the .270 Win.
Willie T Posted - Jul 11 2017 : 19:07:21
Budlight, thanks for the reply, and sharing your experience. If the 4451 does not pan out I will be trying something else. I've still got about 3 months of summer to kill. It is Ray with the 150 Sierra load. I am working on a 130 grain load for whitetail. In no way am I discounting 150's in a 270 but it's not what I'm working on right now. I'm trying to figure out if I can improve on the 130 loads I have worked up. Of the four powders I have tried in this rifle, 55 grains of IMR 4350 have suited it the best. I have had stellar accuracy in 2 other 270's with IMR 4350 so it is one of the first places I turn with a 270. I don't put much stock in the Hodgdon data usually either, but I do use it as a data comparison. I usually gravitate to data generated by the manufacturer of the Bullets I am loading. With 4451, data is still pretty sparce. Atleast in the five manuals I have on my bench, and I will be using hodgdon data. For my rifle stuff I'm ok with extruded powders and throwing light and trickling charges. The exception for me is some higher volume 223 stuff that I throw ball powder charges, and pistol stuff. Everything I do is single stage so none of it is too fast anyway.
budlight Posted - Jul 11 2017 : 11:50:17
willie T you did say 4350 and 150gr.

IMO - And I have done lots of loads with no data using burn rate charts. You can't trust the hodgdon one 100% even for their own powders. Or what about the powders not listed? It sucks. The AA chart is more correct.

I have in the past the 4 kinds of 4350 with light weight 270 rounds. You might want to experiment with Pwr Pro 3000-LR. H-100 V, Ram shot hunter. I don't even like rod powder!
Willie T Posted - Jul 09 2017 : 11:50:00
Budlight, yes I do. I am shooting 130's in a 22" barrel. The faster burn rate of IMR 4350 suits my rifle better than H 4831. Sometimes you can attain published velocity, sometimes you can't. Sometimes you can attain the velocity but it's not worth using cause it shoots like crap. Right now for what I have tried in this rifle, IMR 4350 is tops. Still looking to improve but based on what this rifle is doing, I'm gonna search the area around IMR 4350 on the burn chart first.
budlight Posted - Jul 08 2017 : 23:16:04
Originally posted by RaySendero

Yep same with me again.
My accuracy load is IMR-4350 with a 150 Sierra GameKing.

Do you own or have ever used a chronograph? Reality in days gone by was Imr, AA, H4350 is good for 90, 100 , and 110 gr 270 win Even your diehard J Conners used 4831 in the 60's for 130's and that is because they didn't have anything better
RaySendero Posted - Jul 07 2017 : 06:13:11
Originally posted by Willie T

Thanks for the reply Ray. I have a really consistent load with interlocks and H 4831 but I get better velocity and accuracy with IMR 4350 and Sierra gamekings. .....

Yep same with me again.
My accuracy load is IMR-4350 with a 150 Sierra GameKing.

Willie T Posted - Jul 06 2017 : 20:06:05
Thank you caveman.
caveman0101 Posted - Jul 06 2017 : 19:53:44
I worked up some loads with it for 300 WBY and 280 Rem. I added them to the load info on this sight. I also did my own extreme temp change test with Enduron 4451, H1000, R23. Of course the IMR and Alliant info was all about how their new tech was so much better for temp changes. The hodg beat them both. It only had @10fps change while IMR was @50Fps, R23 was@100FPS. The change in temp was from 80* to 30*.I went into this test with no bias, actually, I was hoping the R23 would be best because I had just bought 8lbs of it.
Kosh75287 Posted - Jul 06 2017 : 15:27:43
I keep WANTING to try one of the ENDURON series of IMR powders, but I don't have a rifle that works and plays nicely with IMR-4451. I was thinking of getting a pound of whichever powder is in the "slower than IMR-3031, but faster than IMR-4320" burning range for my Garand, but the rifle's currently delivering "minute of washtub" accuracy, even with well-established reloads.

I may owe it to myself to go buy a bolt rifle chambered for "SuperHighVelocityMeatHomongenizer", just to piddle, but right now I have more rifles than I can optimize. Darn it...

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