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Joined: Jun 2005
Posts: 27,500
Campfire Ranger
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Campfire Ranger
Joined: Jun 2005
Posts: 27,500 |
That is how I ended up with the 120gr load I have, but of course the Mashburn (7mm/300 WinMag aka 7mm Practical in my case) outruns the WBY by a bunch at the end of the load development phase. I think that the case capacity on the 7/300WinMag is not far off from a 7mmSTW, so starting loads for that round might be an OK beginning place, too.
LOVE God, LOVE your family, LOVE your country, LIKE guns and sports.
About 2016 team "R" candidates "We definitely need a crew with a sack of balls the size of hot water bottles, bloviated estrogen leaking feel-gooders need not apply." Gunner 500
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Joined: Nov 2011
Posts: 3,184
Campfire Tracker
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Campfire Tracker
Joined: Nov 2011
Posts: 3,184 |
With the 4350 140gr. fire form load that it seams everyone uses, are they using mag primers or standard LR primers? I loaded up 10 rounds the other day and after the fact I realized I used WLR. I know they will go bang I was just wondering from a accuracy stand point.
Want To Buy; Form die for a 7mm Mashburn Super. .284 Hornady AMax 162gr. .224 Hornady AMax 75gr. 22-250 bushing die Bushing die that will work with the 7mm Mashburn Super A couple Glock 42 380ACP mags
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Les they will go bang and you will be fine.Never used them for the FF load (use Fed 215),but the WLR primer is no wimp.
The FF load does not shoot quite as "tight"for me in my rifle,as full house Mashburn,and it's slower than what the cartridge will do with a 139/140 but it's fine.Could hunt with it pretty easily.The 139 with 65 IMR4350 does 3150-3190 in my rifle.
I have only shot the 139 Hornady but Beretz used the 140 AB for app. 3200 with his FF load.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Nov 2011
Posts: 3,184
Campfire Tracker
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Campfire Tracker
Joined: Nov 2011
Posts: 3,184 |
Thanks Bob. I am hoping it tales a liking to a bunch of H1000 and a 150gr. Partition.
Want To Buy; Form die for a 7mm Mashburn Super. .284 Hornady AMax 162gr. .224 Hornady AMax 75gr. 22-250 bushing die Bushing die that will work with the 7mm Mashburn Super A couple Glock 42 380ACP mags
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
H1000 works with the 160's and 175's. That I know. Don't see that it should not work well with 150's too. But you know how rifles are......
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Apr 2007
Posts: 3,723
Campfire Tracker
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Campfire Tracker
Joined: Apr 2007
Posts: 3,723 |
Les don't overlook imr7828 for the 150s
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Joined: Nov 2011
Posts: 3,184
Campfire Tracker
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Campfire Tracker
Joined: Nov 2011
Posts: 3,184 |
I have a jug of 7828, Retumbo, R22, and all varietys of 4831. 120 TTSX,120 BT, 150 PT, and 162 Amax. Keep the info flying. And thank you all. I haven't even piped a primer in this rifle and I'm already loving it.
Want To Buy; Form die for a 7mm Mashburn Super. .284 Hornady AMax 162gr. .224 Hornady AMax 75gr. 22-250 bushing die Bushing die that will work with the 7mm Mashburn Super A couple Glock 42 380ACP mags
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Les other than the FF load, I have not fed mine any bullet lighter than the 160's. Seems the other guys will know about the lighter bullets.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Apr 2007
Posts: 3,723
Campfire Tracker
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Campfire Tracker
Joined: Apr 2007
Posts: 3,723 |
Other than fireforming loads all I've ran is 150 grain ballistic tips and 160 grain accubonds both loads with IMR 7828. H1000 shot faster with 150s but wasn't as accurate as 7828
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Joined: Mar 2006
Posts: 20,944 Likes: 3
Campfire Ranger
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Campfire Ranger
Joined: Mar 2006
Posts: 20,944 Likes: 3 |
Dober turned me onto the 150s and IMR 7828. He uses them for all that walks. Me too. This combo works great in my 280's.
By the way, in case you missed it, Jeremiah was a bullfrog.
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Joined: Apr 2011
Posts: 15,360 Likes: 10
Campfire Ranger
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Campfire Ranger
Joined: Apr 2011
Posts: 15,360 Likes: 10 |
I have been working with H1000 primarily in mine. Does very well with both 160's and 175's. Retumbo would work just as well in mine but I didn't really have enough to work with. I get about 3050 from H1000 and 175 PTs, 3200 with 160's. Retumbo seems like it get another 50 FPS on those numbers.
Nice thing with the 7mm MSM is even those bulky powders like H1000 and Retumbo have PLENTY of room in the case to make it work well.
The 150 and 7828 sound pretty good.
140 AB and 65 grains of IMR4350 run 3225 from my fireforming loads. Around MOA. Could easily work with them, but heck, the accuracy on them is plenty for now and the speed is like a 280 Ackley +...
Semper Fi
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Joined: Jan 2008
Posts: 1,456
Campfire Regular
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Campfire Regular
Joined: Jan 2008
Posts: 1,456 |
I have used RL-25 for my 160 gr. loads with fine accuracy +/- .5 in and 3275 fps. velocity. My 175 gr. load is 74 H1000 for 3075. I have some RL-33 to try with 175's but haven't had time to play at the range.
YMMV
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