Reloading for my 270

[tcanthonyii]

Been putting this off all summer, and spring, well since last December when I got my kit. Since that time I've done Lots of 9mm and 45. A few 44, 223, 30-30, 380 and some 300 win mag (helping a friend start out).

So I generally have an idea of what I"m doing, not an expert though, not by a long shot. Somehow I've accumulated 4 suitable powders for my 150 grain round nose bullets. Yes, round nose, they are pulls that I bought from RMR, and happen to be the same bullets that Federal puts in their 150 grain ammo, that I love to shoot.

I have H4831 SC, IMR4831 and IMR4350. I am for sure Loading up the H4831SC and the IMR4350 but am unsure if I should do any work up the IMR4831. I realize it's a different powder but is it worth the 15 or so extra rounds in workup? I've already go 40 ish made up in the H4831sc and IMR4350. That's a lot of rounds through the gun and a lot of time waiting for cool down etc.

I'm not opposed to it at all just curious what everyone else would do?

I also have some RL17. Seems most places say RL19 would be better. I have no idea how I got RL17, don't remember buying it.

 

[NCsmitty]

IMO, all the powders that you have will do the job, and they all run fairly close in velocity potential, even the Rel-17.
H4831 would be my first choice to check, and then I would move to IMR4831, if your groups are not up to your requirements. The slower powders work well especially when teamed with the heavier range of bullets.
Go to the www.hodgdon.com site for their latest data on the Hodgdon and IMR powder loads.
Use www.alliantpowder.com to check out the Rel-17 powder. It is near 4350 burn rate, and works well in the 270 Win. Realize that they may not have your specific bullet listed, but if you use start loads with the appropriate bullet weight you'll be fine working up towards maximum. I would use some caution working up loads with those long, flat base round nose, as they have a lot of bearing surface and may cause a quicker rise in pressure working up toward maximum. Alliant lists only maximum loads on their site but they do say to reduce your loads by 10% for start loads.
I have a 270 myself, but all I have used is Rel-19 at this point.
Just be safe, and have fun.


NCsmitty

 

[bob4]

I've recently used some r-19 myself with less than 1 inch MOA. Although the load was on the lighter side. Lighter as in at 1.5 inches high at 100 it was 1/2 inch low at 200 and that shouldn't be in my minds eye.
Going back to H-4831 it seems to be the go-to powder for the 270.

 

[LBEE]

I have been reloading for over 50 Years with the 270W being my Favorite Hunting Rifle. I had a Custom 270W I worked up a Load with IMR 4350 at 100 yards where a three shot group could be covered with a Dime. In reloading for the 270W in my opinion the IMR4350 is
the powder to Beat, I use nothing else but IMR4350 for this Round. I really like the 270W for
hunting everything fro Groundhogs to Elk, good luck.

 

[Grumulkin]

I have H4831 SC, IMR4831 and IMR4350. I am for sure Loading up the H4831SC and the IMR4350 but am unsure if I should do any work up the IMR4831. I realize it's a different powder but is it worth the 15 or so extra rounds in workup? I've already go 40 ish made up in the H4831sc and IMR4350. That's a lot of rounds through the gun and a lot of time waiting for cool down etc.

I'm not opposed to it at all just curious what everyone else would do?

I also have some RL17. Seems most places say RL19 would be better. I have no idea how I got RL17, don't remember buying it.

You must be the timid type. I wouldn't think twice about loading up 15 or 50 cartridges in load workup. The only "cool down" I do is the time it takes to walk 100 or 200 yards and back when I change targets.

I don't shoot 150 grain bullets in my 270 Winchester. For what it's worth, I shoot Remington 130 grain Core-Lokt bullets in mine over IMR 8208 XBR which has given me excellent accuracy and excellent performance on deer.

 

[tcanthonyii]

Timid? Nope. Just lots of time and I do it at a friends house 20 miles away then we get to talkin and before you know it you've used up a whole day and have half your loads still needing to be tested.

 

[CarJunkieLS1]

I'm using IMR 4831 its the only powder I've tried for my .270 Win. Haven't needed to try anything else. My loads shoot consistent 1/2 groups (3 shots). I haven't tried any RL stuff because I've heard its a little temp sensitive.

 

[tcanthonyii]

Think you all talked me into making up the imr4831 too.

 

[CarJunkieLS1]

I'll give you my load for the .270 (use at own risk data is under max in some published data and over max in other data)

Winchester brass
COAL 3.300 (used Sierra manual)
56.5 grains of IMR 4831 I started at 54 and sierra has a max of 57.1 listed for their bullets.
Remington 9 1/2 primer
130gr Sierra prohunter and 130gr Nosler Accubond.

Both bullets with everything else the same shoots under MOA. Sierra is .75 inches and Accubond is .500 inches at 100yds. Hope this helps post results if you get them.

 

[tcanthonyii]

Thank you guys! I appreciate the help.

 

[Mohave-Tec]

I have come to a point in my reloading that if I have powders that give me similar results and have similar reaction at temperature changes then I'm eliminating less user friendly powders for the one that handles/meters the best. This is not so much for the 270 where I only make but so many rounds but more for production of multiple rounds. In the name of efficiency, I have great hopes for the H4831SC because it is easy to work with. I will start working up loads for this powder in a week or so.
I just quite H335 powder for my AR15 plinking rounds in preference for Benchmark; both of which give me excellent accuracy. I started with the H335 because it is almost fluid to work with but it ended up all over my work area almost magically.

 

[scottishkat]

Mr. 270

Mr. 270 himself Jack Occonner shot the 270 win with 60 grains of H4831 back in the day. It still shoots today work up with caution. Sometimes the throats can be shorter in rifles and this condition makes IMR 4350 a better choice. Both powders are a fine choice the 270 it is not finickey.

Good Luck and shoot straight also give us a report.

 

[tcanthonyii]

60 grains? Wow. I have imr4350 and h4831sc loads made up already. IMR4831 I'll try to do friday night. Hoping to test Saturday or Sunday if the wind ever dies down here. I need to put a couple factory rounds through it yet as I have only sighted in at 50 yards. It's a Marlin XL7. I bought one used last fall only to find that it had a rough chamber and was puncturing brass. Remington replaced it with a new one. Just need to finish messing with it now. I just hope it shoots as well as my Remington 770 did. Yes it was a cheap gun but is was as accurate as any expensive gun. If I did what I was supposed to you could lay a dime on a 3 shot group.

 

[ArchAngelCD]

H4831SC and H4831 are the same powders except for the "SC" being Short Cut. You will be hard pressed to see the difference downrange between H4831 and IMR4831. The load data is slightly different but the results are almost identical. IMO 4831 is a slightly better choice for the 270 especially with heavier bullets and 4350 is a better choice for the 30-06. Even with 4350 you will be hard pressed to tell the difference downrange between IMR4350, H4350 and AA4350.

Of course every rifle is different and you will never know for sure unless you try but if you get very good accuracy with 4831 I would stick with that and not waste more components on testing any further.

 

[scottishkat]

60 grains? Wow. I have imr4350 and h4831sc loads made up already. IMR4831 I'll try to do friday night. Hoping to test Saturday or Sunday if the wind ever dies down here. I need to put a couple factory rounds through it yet as I have only sighted in at 50 yards. It's a Marlin XL7. I bought one used last fall only to find that it had a rough chamber and was puncturing brass. Remington replaced it with a new one. Just need to finish messing with it now. I just hope it shoots as well as my Remington 770 did. Yes it was a cheap gun but is was as accurate as any expensive gun. If I did what I was supposed to you could lay a dime on a 3 shot group.

Believe it or not my latest hornaday manual has max loads of H4831 with 130 grains at 62.