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Joined: Jun 2009
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Love accubonds but my Nephews shoot all copper and I plan to load a bunch of Etips soon. Can I expect much if any changes at 300 - 400? 270 130s Thanks!
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Joined: Aug 2005
Posts: 15,648
Campfire Ranger
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Campfire Ranger
Joined: Aug 2005
Posts: 15,648 |
Yes..
Significantly more pressure with like charges. I would most certainly not interchange data...
- Greg
Success is found at the intersection of planning, hard work, and stubbornness.
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Joined: Feb 2001
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Campfire Kahuna
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Campfire Kahuna
Joined: Feb 2001
Posts: 50,629 |
Yes..
Significantly more pressure with like charges. I would most certainly not interchange data... Always step back when changing components... but I have never seen pressures increase even a little bit with TSX and would not expect much change... But always start low!
Mark Begich, Joaquin Jackson, and Heller resistance... Three huge reasons to worry about the NRA.
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Joined: Jan 2005
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Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 57,477 |
You can do a somewhat educated guess by bearing surface comparisons and how the load is related to the throat OAL basically.
But there are other variables and the easy way for me thats been safe, back it off a couple of grains, 1-2 rounds and load it up back to normal and run em over a chrono. One of the very few uses for the chrono IMHO.
No way would I load a lot of the same load. Nor would I waste personally more than 1 shot going back up a grain at a time basically.
I would certainly clean the barrel first, very well and fire 5 fouling shots of the low charge though before I went over the chrono with test loads
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Aug 2005
Posts: 15,648
Campfire Ranger
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Campfire Ranger
Joined: Aug 2005
Posts: 15,648 |
Yes..
Significantly more pressure with like charges. I would most certainly not interchange data... Always step back when changing components... but I have never seen pressures increase even a little bit with TSX and would not expect much change... But always start low! The E-tips are a different animal - With all E-tips, I'd start at minimum in all cases -
- Greg
Success is found at the intersection of planning, hard work, and stubbornness.
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Joined: Nov 2011
Posts: 30,960
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2011
Posts: 30,960 |
According to Nosler, you should expect to reach max pressure with a mid-level load with Etips. Do not start with a book max load......or you may be in for a bit of a surprise.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
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Gregw Sitkadeer rost495 Antelopesniper ~
Great pointers ! Thanks
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Joined: Feb 2001
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Campfire Outfitter
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Campfire Outfitter
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I would follow Nosler recommendations, in 4 different rifles I load about 1 grain less with same velocities. But I worked up to that.
The new E Tips have a groove in them, which may reduce pressure.
kk alaska
Alaska 7 months of winter then 5 months of tourists
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KK ~
I do see the E cavity. Hope this goes well and have similar great accuracy as Accubonds.
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Campfire Outfitter
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Campfire Outfitter
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Draftmule most of the rifles were Rugers and they seem to accept more powder to see normal velocities. So use caution in a tight chamber or short throat rifle.
Barnes TSX or TTSX seem to have less pressure as stated. Go by your chrono and be safe!
kk alaska
Alaska 7 months of winter then 5 months of tourists
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Joined: Mar 2006
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Campfire Ranger
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Campfire Ranger
Joined: Mar 2006
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With 68 gr's of 748 the increased pressure with E-Tips from Accubonds was 40-75 fps in my 300 WSM with 150's.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country." Robert E. Lee
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Joined: Feb 2001
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Campfire Outfitter
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Campfire Outfitter
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Draftmule PM JB he shoots the E tip as I recall.
In my Forbes 7mm-08 22"
Same charge of 46.5 Gr Ram Shot Big game the 140 Gr N Accu Bond was 2797 & 2805 FPS
the Nosler 140 Gr E Tip was 2829 & 2805 FPS
Same kind of brass and primers both loads. Worked up to those loads.
The Forbes has a tight chamber and most loads are about 1 gr less than my other 2 7mm-08,s.
kk alaska
Alaska 7 months of winter then 5 months of tourists
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Joined: Feb 2001
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Campfire Outfitter
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Campfire Outfitter
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I would drop about 2 grains off of your Accubond load and work up to pressure and velocity.
Had a sticky case with my E Tip load today going to reduce load.
kk alaska
Alaska 7 months of winter then 5 months of tourists
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OP
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Thanks Guys!
My initial plan are the following 3 loads at min start grains for 270 Win in 130 Etips and 130 Barnes Tripleshocks.
IMR 4350 51g @ 2828 H 4831sc 55g @ 2909 VIHR N560 56.2 @ 2873
Why? H 4831sc is most accurate load in Nosler book. IMR 4350 seems popular 270 powder VIHR N560 is my favorite powder for my 270Wby
Seem light but safe, will be interesting.
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