In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.

300 win mag loads

vette81vette81 Member Posts: 177 ✭✭✭
edited January 2015 in Perry Shooter Competition Shooting and Reloading Forum
I have a WIn model 70 supergrade in 300 win mag. Anyone have a favorite load they would share. With all the shortages of powder kinda hard to experiment with different powders. I have some varget, IMR 4350 and IMR 4320. I triied the IMR 4320 and didnt really have any thing promising. Best groups were around 1". Note this is a fairly new rifle with less than 100 rounds through it.
· Share on FacebookShare on Twitter

Comments

  • JustCJustC Member Posts: 16,056 ✭✭✭
    edited November -1
    none of those powders is ideally suited to the 300 win mag. RL19, RL22, IMR7828, H1000, etc
    · Share on FacebookShare on Twitter
  • CapnMidnightCapnMidnight Member Posts: 8,038 ✭✭
    edited November -1
    JustC is correct about the powders you have not being ideal for the 300 Win Mag.
    I've been a 300 mag shooter for 44 years now, I've filled a freight car full of elk meat in those years. My standard load is a 180 grain Nosler patrician or AccuBond over 75 grains of H4831SC and a Winchester WLR primer. I would work up to this load, checking for pressure signs My old 300 Win still holds less than 1 MOA with this load.
    If you can't find any H4831SC, my only other choice would be H1000.
    W.D.
    · Share on FacebookShare on Twitter
  • vette81vette81 Member Posts: 177 ✭✭✭
    edited November -1
    Thanks guys. I will see if I can find some of those powders. Powder is really scarce round here right now.
    · Share on FacebookShare on Twitter
  • AmbroseAmbrose Member Posts: 3,208 ✭✭✭✭
    edited November -1
    The powders recommended here are good ones but IMR4350 is a pretty good powder for the .300 Win. Mag. I have a couple of .300's and I just checked my range notes and I've used that powder with both 150 and 180 gr bullets. I worked up those loads from an older (1980) Hornady manual and notice that the newer Hornady manual has cut back the max. loads so I won't mention the powder charge. But I was getting 3250 fps with 150's and 2950 with 180's. Since you already have IMR4350, why not start there? (But if you need groups that average less than 1" with your .300, I don't know what to tell you!)
    · Share on FacebookShare on Twitter
  • MG1890MG1890 Member Posts: 4,460 ✭✭
    edited November -1
    I always preferred H4831 and H1000 in the Win Mag.

    If you are just going to shoot deer, some 165 grain bullets and the IMR4350 should get you going.
    · Share on FacebookShare on Twitter
  • vette81vette81 Member Posts: 177 ✭✭✭
    edited November -1
    I'm gonna give the IMR 4350 a try. I know it shoots good in my 30/06. I was able to find the 4831 SC so im gonna work up some loads using each.
    Thanks again.
    · Share on FacebookShare on Twitter
  • JustCJustC Member Posts: 16,056 ✭✭✭
    edited November -1
    4831sc is going to walk all over 4350 in that cartridge. Trust me[;)] 4350 is workable, but only if nothing else is available in the acceptable burn rate. It is a bit fast for a case capacity like the 300 win. 74gr RL22 under a 178gr a-max made for a wicked accurate load that killed deer like a hammer in several remington 700 heavy barreled rigs I loaded for.
    · Share on FacebookShare on Twitter
  • MobuckMobuck Member Posts: 14,081 ✭✭✭✭
    edited November -1
    Expectations of under MOA groups from a sporter weight 300 Win mag are reaching pretty high. Yes, it IS possible but I feel neither advantageous for most needs nor a worthwhile use of components. Elk are much bigger than prairie dogs.
    · Share on FacebookShare on Twitter
  • AmbroseAmbrose Member Posts: 3,208 ✭✭✭✭
    edited November -1
    If you want to try something funny, see if you can find some 220 gr. Sierra RN bullets. Load them with 71.5 of your new-found H4831sc and a Fed. 215 or Win. magnum primer. I don't know what game you would use that load for but it sure groups nice in my TC Icon.
    · Share on FacebookShare on Twitter
  • vette81vette81 Member Posts: 177 ✭✭✭
    edited November -1
    Well it likes the H 4831 SC better than the IMR 4350. 75 grns behind a 168 grn Nolser BT gave 1" groups at 100 yds. Thanks for the tip on the powder.
    · Share on FacebookShare on Twitter
  • Okie743Okie743 Member Posts: 2,700 ✭✭✭✭
    edited November -1
    quote:Originally posted by CapnMidnight
    JustC is correct about the powders you have not being ideal for the 300 Win Mag.
    I've been a 300 mag shooter for 44 years now, I've filled a freight car full of elk meat in those years. My standard load is a 180 grain Nosler patrician or AccuBond over 75 grains of H4831SC and a Winchester WLR primer. I would work up to this load, checking for pressure signs My old 300 Win still holds less than 1 MOA with this load.
    If you can't find any H4831SC, my only other choice would be H1000.
    W.D.


    Amen: To the above reload combo's. H4831SC or if you see any H4831. The SC means the granules are short cut. (not as long and meters easier thru the powder measure.
    DO NOT substitute with IMR4831 as some sellers will tell you. IMR4831 is not the same burn rate, etc.
    · Share on FacebookShare on Twitter
  • Okie743Okie743 Member Posts: 2,700 ✭✭✭✭
    edited November -1
    If you would like to play with your 300 Win mag and not get kicked silly check into reduced loads 2400 fps or so using 5744 powder.
    You might be surprised that at 100 yards if you will play with the powder charge and non magnum primers you DO NOT even have to make any scope adjustments at 100 yards when going from low velocity to HV reloads and usually get very excellent consistent groups using this powder. Accurate Arms may have a reduced load listed. If not contact them for such. I use the 5744 for low recoil reduced loads for grandkids that shoot a 300 win mag using 150 and 180 grain bullets.
    I only shoot 3 shot groups (not 5 shot) out of a 300 when using High Velocity loads due to barrel heating and let the barrel cool between groups.
    · Share on FacebookShare on Twitter
  • tsr1965tsr1965 Member Posts: 8,682 ✭✭
    edited November -1
    My experience tells me, to get consistent accuracy, first do some work to the rifle, then go to your loads, and recipe's.

    The work on the rifle is fairly simple...install pillars, and bed the action, free float the barrel, and have the trigger adjusted for a clean 3-4 pound pull. Make sure the action bolts are properly torqued after the bedding job.

    I have had great success with IMR 4350, W-W 760, and Reloader 22, in the 300 Winchester Magnum. I use the IMR 4350 and R-22 for bullet weights from 150 to 200 grain, and the W-W 760 exclusively for the Barnes 130 grain XLC, and the TTSX.

    This is in a first generation Browning A-Bolt Stainless Stalker.

    Best
    · Share on FacebookShare on Twitter
  • FEENIXFEENIX Member Posts: 10,559 ✭✭✭
    edited November -1
    quote:Originally posted by JustC
    4831sc is going to walk all over 4350 in that cartridge. Trust me[;)] 4350 is workable, but only if nothing else is available in the acceptable burn rate. It is a bit fast for a case capacity like the 300 win. 74gr RL22 under a 178gr a-max made for a wicked accurate load that killed deer like a hammer in several remington 700 heavy barreled rigs I loaded for.


    H4831SC is my go to powder for 6.5x55, .270 Win/AI, .30-06, .300 Win, and .338 Win. [^]
    · Share on FacebookShare on Twitter
  • Okie743Okie743 Member Posts: 2,700 ✭✭✭✭
    edited November -1
    quote:Originally posted by FEENIX
    quote:Originally posted by JustC
    4831sc is going to walk all over 4350 in that cartridge. Trust me[;)] 4350 is workable, but only if nothing else is available in the acceptable burn rate. It is a bit fast for a case capacity like the 300 win. 74gr RL22 under a 178gr a-max made for a wicked accurate load that killed deer like a hammer in several remington 700 heavy barreled rigs I loaded for.


    H4831SC is my go to powder for 6.5x55, .270 Win/AI, .30-06, .300 Win, and .338 Win. [^]


    If your 300 mag won't shoot a decent 3 shot group at 100 yards with H4831SC you and/or the gun have some serious issues.
    · Share on FacebookShare on Twitter
  • FEENIXFEENIX Member Posts: 10,559 ✭✭✭
    edited November -1
    quote:Originally posted by Okie743
    quote:Originally posted by FEENIX
    quote:Originally posted by JustC
    4831sc is going to walk all over 4350 in that cartridge. Trust me[;)] 4350 is workable, but only if nothing else is available in the acceptable burn rate. It is a bit fast for a case capacity like the 300 win. 74gr RL22 under a 178gr a-max made for a wicked accurate load that killed deer like a hammer in several remington 700 heavy barreled rigs I loaded for.


    H4831SC is my go to powder for 6.5x55, .270 Win/AI, .30-06, .300 Win, and .338 Win. [^]


    If your 300 mag won't shoot a decent 3 shot group at 100 yards with H4831SC you and/or the gun have some serious issues.


    I was blessed with a bull elk in 2013 with my load at 931 yards (http://forums.GunBroker.com/topic.asp?TOPIC_ID=616839&SearchTerms=got,bull,elk).
    · Share on FacebookShare on Twitter
  • Okie743Okie743 Member Posts: 2,700 ✭✭✭✭
    edited November -1
    Good work!
    A properly prepared 300 mag rifle will get er dun if the shooter can do their part.
    · Share on FacebookShare on Twitter
Sign In or Register to comment.