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!

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!

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

The E-tips are a different animal -

With all E-tips, I'd start at minimum in all cases -

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.

Gregw
Sitkadeer
rost495
Antelopesniper ~

Great pointers !
Thanks

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 ~

I do see the E cavity.
Hope this goes well and have
similar great accuracy as
Accubonds.

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!

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.

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.

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.

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.