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Sad to admit yep going in a .243 that really likes them. That is not enough $$ for a 100. Sent you a pm. AND thanks more than you can know!!! Great guys here to help like this.!! (y)

I started last July trying to get a supply of 90 AB in .243! It has been a bust went thru long backorder that was supposed to be available in November, didn't happen. Then reordered 500 from both bullets.com and cabela AGAIN. Was ETA ship date of approx Feb 15, 2016. Just now got word from...

One important thing to keep in mind is that load development effort is the same so why not start with most stable you can to begin with.

Here is a really good comparison to what many consider the most temperature stable powder made, H4350. Note the velocity changes on H4350 also. This is considered stable by most long range shooters. The key is KNOW what your changes are with temp and adjust accordingly...

Depends on how far you need to setup to be accurate. IMO ES's of a load need to under 2% of velocity at 500 yds and under 1% to go to 1000yds and stay moa. So if load is 3,000 fps es's under 60fps will take you to near 500 and es's under 30 will take you to near 1000yds. For 1000yd setups I use...

H4831SC is another for sure.

Burn rate is supposed to be very similar to IMR4350. I have asked them for the VMD factor for it. If its dense like the newer powders hitting the market but with IMR4350 burn rates it will "fill" many a case in the future!

With RL 26 I found lower ES's and better accuracy in every caliber and combo tested by using magnum primer, if that helps any.

Been thinking on RL 26 with the 90 AB in the 243 also....... QL for 20" barrel at OAL 2.65" ????????? I remember you adjusting Ba for RL26 in other calibers.

See here from Nosler 8th Edition

I perfer this ANSI/SAAMI 2015 version as it not only gives pressure ratings in both PSI and CUP on many cartridges but also establishes known velocities with most loadings and bullet weights..... It list only the .280 Rem and no mention of 7mm Express, anyway has CUP listed as 50,000 and psi at...

+1 here too.

It is the Oryx that they have been providing Norma for their ammo in different weights. One of the top terminal performance bullets ever made.

I just don't see as much change in different bullets of same weight if similar in design, but better safe than sorry so yes, I still do basically the same process when I change ANY component.

At primer change I drop about 2 grains with charges under 60 grains and 3-4 on charges 60+ grains. Or about 3% on average......if want to be really safe drop 5%. But the below process will work either way. i.e take my known velocity lets say current load is 60 grains at 3,000fps. 60gr @ 3,000...

Shoot the same 56gr charge and see. H4350 needs in general .5 to 1 grain more to reach same pressure as IMR4350.. When you get to 2,900 fps your pretty much at max pressure with 165 grain bullets but it will shoot the same over a wider range of extremes than the IMR.

+1!!! Yes the only one that matters is the FIRST ONE!!

Have seen this before with IMR powders in cold temps, not a big deal for hunting rig but you may be able to lock down a bit more consistency with H4350 instead of IMR4350. I have seen H4350 shoot better groups in the cold but it is combination specific. Your just seeing temperature sensitivity...

Just updated burn rate chart from Hodgdon indicates that you can use starting loads of the 4350's and work up load from there. Updated Yesterday. http://www.imrpowder.com/PDF/Burn%20Rat ... 5-2016.pdf http://bulletin.accurateshooter.com/201 ... ate-chart/ And it was designed as a direct...

RR is correct on RL26 burn rate, it is faster burning than shown on charts and in most load data. At 2,900 using the exact load the OP posted it is starting to get warm on pressure.