good powder and charge for 243 and 270

xcracer160 · December 20, 2013, 05:05 PM

looking for a good powder to share between 243 and 270, i am wanting to get into shooting for acuracy and hunting, i have a rcbs rock crusher and rcbs scale, and i have sierra 100 gr spitzer bt , and for the 270 i have some hornady 140 gr btsp i want to use for long range deer, and i have speer 90gr hp tnt can someone reccomend me a safe beginer load and powder for both rifles?

jwrowland77 · December 20, 2013, 05:09 PM

Please don't take this the wrong way, but do you have any manuals?

If not, that's the first place I would start. They will list starting loads and max loads, along with powders suitable for the caliber.

TXJohn · December 20, 2013, 05:15 PM

IMR 4350 will work for both the 243 and 270.

243 win start 38.5 max 42.0 with 100 gr.

270 win start 49.0 max 53.2 with 140gr.

xcracer160 · December 20, 2013, 05:18 PM

honestly i have verry little info about reloding rifles,( spent a few years trap shooting) and want to get the materials as i find them i have reloaded 223 but stayed a good 10% under for a starting point, i have searched and searched online and picked up a few books and took alot of notes here and there for max loads and looked up alot of manufacturer loads for each but ifi can find a good powder for both i will start looking into what safe charges would be, do i make much sence? from what i gather h380 or alliant 4350 are both suitable powders for this cartiges butwant some input before i even try putting things together.

jwrowland77 · December 20, 2013, 05:22 PM

IMR4350 and heavier bullets in .243, IMR7828. I don't reload for .270 yet but plan on it in the future

Panfisher · December 20, 2013, 07:54 PM

http://data.hodgdon.com/main_menu.asp

Brian Pfleuger · December 20, 2013, 07:59 PM

.243 and .270 are both going to use powders in the middle to slightly slow end of the spectrum.

There's a ton of data available online.

Don't worry about matching the exact bullet. As long as the weight and construction is similar, as in lead core, copper jacket (most bullets) or solid, monolithic (Barnes TSX, Hornady GMX) you can interchange data

xcracer160 · December 21, 2013, 11:45 AM

ok i got a 1/2 lb of h380 its a common powder between the 2 i am going to try a base load of 34 gr for the 100 gr siera spitzer boattail int he 243calls for max @ 38 gr., and for the 270 i want to try a 55 gr load (max load 59 gr) of the speer 90 gr holow point tnt projectile, both with federal 210 magnum primers? would this be a reasonable starting point? till i can gather some books and get more info?

RC20 · December 21, 2013, 12:39 PM

I don't own a 243 so no input on that end.

I have worked with two picky 270s and the 4350 powder was the one that got one acceptable (my view at 1.25" at 100) and the other sub moa at 100.

I won't being to say its the only powder for 270 but it seems to be universal in that it seems to work well in 270s generally though there may be some it does not.

If it works in the 243 as well then it would be a good one to start with.

PA-Joe · December 21, 2013, 01:18 PM

IMR 4064 also works.

Brian Pfleuger · December 21, 2013, 03:49 PM

Quote:

ok i got a 1/2 lb of h380 its a common powder between the 2 i am going to try a base load of 34 gr for the 100 gr siera spitzer boattail int he 243calls for max @ 38 gr., and for the 270 i want to try a 55 gr load (max load 59 gr) of the speer 90 gr holow point tnt projectile, both with federal 210 magnum primers? would this be a reasonable starting point? till i can gather some books and get more info?

Follow the links to Hodgdon data. The "H" is H380 stands for Hodgdon. They have the data you want, for free, online.

Both of your max loads are way over Hodgdon's data.

December 20, 2013, 05:05 PM	#1
xcracer160 Member Join Date: December 19, 2013 Posts: 32	good powder and charge for 243 and 270 looking for a good powder to share between 243 and 270, i am wanting to get into shooting for acuracy and hunting, i have a rcbs rock crusher and rcbs scale, and i have sierra 100 gr spitzer bt , and for the 270 i have some hornady 140 gr btsp i want to use for long range deer, and i have speer 90gr hp tnt can someone reccomend me a safe beginer load and powder for both rifles?

December 20, 2013, 05:15 PM	#3
TXJohn Senior Member Join Date: March 15, 2010 Location: Ft Worth TX Posts: 163	IMR 4350 will work for both the 243 and 270. 243 win start 38.5 max 42.0 with 100 gr. 270 win start 49.0 max 53.2 with 140gr. Last edited by TXJohn; December 20, 2013 at 05:25 PM.

December 20, 2013, 07:59 PM	#7
Brian Pfleuger Moderator Emeritus Join Date: June 25, 2008 Location: Austin, CO Posts: 19,578	.243 and .270 are both going to use powders in the middle to slightly slow end of the spectrum. There's a ton of data available online. Don't worry about matching the exact bullet. As long as the weight and construction is similar, as in lead core, copper jacket (most bullets) or solid, monolithic (Barnes TSX, Hornady GMX) you can interchange data __________________ Nobody plans to screw up their lives... ...they just don't plan not to. -Andy Stanley

December 20, 2013, 05:09 PM	#2
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	Please don't take this the wrong way, but do you have any manuals? If not, that's the first place I would start. They will list starting loads and max loads, along with powders suitable for the caliber.

December 20, 2013, 05:18 PM	#4
xcracer160 Member Join Date: December 19, 2013 Posts: 32	honestly i have verry little info about reloding rifles,( spent a few years trap shooting) and want to get the materials as i find them i have reloaded 223 but stayed a good 10% under for a starting point, i have searched and searched online and picked up a few books and took alot of notes here and there for max loads and looked up alot of manufacturer loads for each but ifi can find a good powder for both i will start looking into what safe charges would be, do i make much sence? from what i gather h380 or alliant 4350 are both suitable powders for this cartiges butwant some input before i even try putting things together.

December 20, 2013, 05:22 PM	#5
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	IMR4350 and heavier bullets in .243, IMR7828. I don't reload for .270 yet but plan on it in the future

December 20, 2013, 07:54 PM	#6
Panfisher Senior Member Join Date: July 30, 2010 Location: Missouri Posts: 1,337	http://data.hodgdon.com/main_menu.asp

December 21, 2013, 11:45 AM	#8
xcracer160 Member Join Date: December 19, 2013 Posts: 32	ok i got a 1/2 lb of h380 its a common powder between the 2 i am going to try a base load of 34 gr for the 100 gr siera spitzer boattail int he 243calls for max @ 38 gr., and for the 270 i want to try a 55 gr load (max load 59 gr) of the speer 90 gr holow point tnt projectile, both with federal 210 magnum primers? would this be a reasonable starting point? till i can gather some books and get more info?

December 21, 2013, 12:39 PM	#9
RC20 Senior Member Join Date: April 10, 2008 Location: Alaska Posts: 7,014	I don't own a 243 so no input on that end. I have worked with two picky 270s and the 4350 powder was the one that got one acceptable (my view at 1.25" at 100) and the other sub moa at 100. I won't being to say its the only powder for 270 but it seems to be universal in that it seems to work well in 270s generally though there may be some it does not. If it works in the 243 as well then it would be a good one to start with.

December 21, 2013, 01:18 PM	#10
PA-Joe Senior Member Join Date: June 9, 2010 Location: NEPA Posts: 909	IMR 4064 also works.