270 win.reloading

[mphfreak]

Has anyone had better luck with varget or imr 4064? I cant get a decent group out of h4831sc unless i reduce the loads to min. With the varget im getting 3/4 groups or better using max plus loads with no pressure signs. Just curious if im the only one because everywhere you read that H4831 is the GO TO powder for 270. My rifle is a Winchester model 70 XTR 22" barrel. 1 in 10 twist. Ive noticed this with 3 different bullet grains. 110, 130 and 140.

[6tmile]

I have tried it, but didnt like it , I use imr 4350 withamax load of 55 grains and only shoot 130 grain bullets, it is a very accurate load, try 10 percent lower and work up.

[ram crazy]

Originally Posted by mphfreak

Has anyone had better luck with varget or imr 4064? I cant get a decent group out of h4831sc unless i reduce the loads to min. With the varget im getting 3/4 groups or better using max plus loads with no pressure signs. Just curious if im the only one because everywhere you read that H4831 is the GO TO powder for 270. My rifle is a Winchester model 70 XTR 22" barrel. 1 in 10 twist. Ive noticed this with 3 different bullet grains. 110, 130 and 140.

I use IMR 4350 in my 270 Rem. Titanium with the 22" barrel and I also bedded the rifle. Also try different brands of primers. 4831 with the 22" barrel may not be burning all the powder before it gets out the end of the barrel. I found in my rifle that 54.6 gr. of IMR4350 with Federal 210 primers and 130 gr. Accubonds works the best for me. Every rifle has a load it likes half the fun is trying to find that load.

[Homesteader]

Like the others, I've had good luck with IMR 4350 although just a touch more powder then the others, and a 140g tsx...................................kills elk dead. I never tried 4831, but did try H450 but the groups blew. My load out of a 22" Rem barrel is clocking 2890, no bullets recoverd

[leo]

Originally Posted by mphfreak

Has anyone had better luck with varget or imr 4064? I cant get a decent group out of h4831sc unless i reduce the loads to min. With the varget im getting 3/4 groups or better using max plus loads with no pressure signs. Just curious if im the only one because everywhere you read that H4831 is the GO TO powder for 270. My rifle is a Winchester model 70 XTR 22" barrel. 1 in 10 twist. Ive noticed this with 3 different bullet grains. 110, 130 and 140.

Before totally writing off a given load it would be of great value to know what the best accuracy load with the given components chronographs at. It may be a reduced load in the book but still offer reasonable velocity.

[mphfreak]

Originally Posted by leo

Before totally writing off a given load it would be of great value to know what the best accuracy load with the given components chronographs at. It may be a reduced load in the book but still offer reasonable velocity.

Yes I agree, next toy is a chrony. I have some H4350 i may give a try for the 140 grains. Good thing I have a quarter section to do some shooting otherwise thats alot of trips to the range. lol

Another question i do have is how does the bullet depth in the case affect pressure since it does make the cartridge overall Area smaller? This too would change accuracy I would believe. i placed a 110 grain cartridge along side one that i have loaded with a 140 grainer and of course the 140 grainer is pushed in the cartridge alot deeper changing the area inside. Just me thinking out loud.......

[wolf308]

i use h1000 for the 130s and re 22 for the 150s great accuracy, 3060 fps and 2860 respectively, also a 22",tikka.

[Pudelpointer]

Depending on the rifle in question, I have found that some bullets shot better with 4350, or 4831, or H4350, or H4831. Depends on the bullet, the rifle, the case, etc.

If you luck out and find a great load with the first powder you try, then you are just that - lucky.

Part of the fun of reloading is figuring out what works.

[270WIN]

I've never loaded H4831 but have used a slightly under max load of IMR4831 along with 130 gr Sierras in my 270s for years and have been satisfied with the results. Usually 1 to 1.25 inch groups if I do my part right.

[leo]

Originally Posted by mphfreak

Another question i do have is how does the bullet depth in the case affect pressure since it does make the cartridge overall Area smaller? This too would change accuracy I would believe. i placed a 110 grain cartridge along side one that i have loaded with a 140 grainer and of course the 140 grainer is pushed in the cartridge alot deeper changing the area inside. Just me thinking out loud.......

You have a point with the overall length affecting accuracy, but it is more likely due to the distance off the lands of the rifling that will affect accuracy and raise pressures. Potentially every change you make, even ones that seem insignificant, will affect accuracy and pressure to some degree. Thats why it's so much darned fun handloading.. Good luck .

Leo

[Homesteader]

Originally Posted by mphfreak

Another question i do have is how does the bullet depth in the case affect pressure since it does make the cartridge overall Area smaller?

The longer the coal. the more pressure you will create with any given load, and conversely the shorter the coal. the less pressure you will create. This is why Weatherby rifles have more freebore then most rifles. The more time a bullet has before it engages the lands, the lower the pressure.

[Dr. Phil A]

I got one out of Winnipeg (cabelas) and it was here in 2 days for 125 bucks. I had to build a stand for it. It works awesome.

I am reloading for a .243 Varminter and I found that no matter what bullet I use from 55 gr to 70 grain that the 3500-3600 fps was the most accurate. Above or below and things started to stretch out.

Like most of the other posts on here about ammo, your gun will decide what it likes.

[mphfreak]

Thanks guys, if it wasnt so darn windy id be out making holes.

[couleefolk]

can't say much on your loads, but i've put my loads, 110gr sierra prohunter with 56gr winchester760 through two different 270's, and both guns could get down to a half inch @ 100yds, and on my bad days they may stretch to 1.25". apparently the 760 is affected by cold weather, but i have not found that to be true for myself. usually each gun is different, but sometimes you can get lucky.

[mphfreak]

I just went out and made some holes with 53 and 54 grains of H4350 at 100 yards with my 270, my first shot with a cold barrel made its mark and then the 3 consecutive holes are grouped nice but moved over 3 inches. let the barrel cool down and did this again with another 4 shells. same thing. Anybody see this before? I attached a photo of the target.

[tchardy1972]

would I be correct in guessing it is a wood stocked rifle?

[mphfreak]

yes it is. i checked the barrel and i can slide about 6 pieces of paper all the way down the stock / barrel.

[wolf308]

i started out reloading with the 270 and h 1000 powder with speer 130 gr spitzers and it was in winter too,wasnt -15 but only -4 outside then and i didnt have the problem you have(i didnt even use the same brand o casings at first) . hogdon powders are supposed to be the best i think for mastering the elements. im thinking it could be 2 things:

1) you fire that first shot with a clean bore. dont! shoot a fouler or two then let it cool and try your groupings

2) maybe the crown on your rifle is slightly damaged/******ed, and it gives a different POI first shot. ive had 3 rifles and 1 handgun that shot so much better after taking it in and getting a quick 30 second crown repair performed on them.

if these dont work im not sure ,you say its a wood stock, but your shots arent creeping progressivly further which is a definate wood stock problem,and you definatley need that 1st cold bore shot. hope this helped

[mphfreak]

The only thing i did mess with is i had the stock off the day before. I was told by someone to not torque on the rear bolts as much and tigten the barrel bolt real snug. Im gonna try that.

Jay

[mphfreak]

Rifle is shooting good again. Must have overtorqued the triggergaurd screws. Groups are back.

[Homesteader]

Glad to hear.

[gitrdun]

Originally Posted by mphfreak

Rifle is shooting good again. Must have overtorqued the triggergaurd screws. Groups are back.

Good to hear that. But remember this, holes #2 and #3, 4 and 5 only count on paper. Hole #1 is the one that counts in hunting.