12-09-2023, 10:35 AM
Xbr book limit is 29.8 gr. H335 is another choice for the 100 ttsx, I show a book max of 30.4, so your 100 ttsx loads are in the right ballpark. For 18" I'd look for a node 2630-2675.
I load longer than book for the 100 ttsx (about 2.275) in order to do that (for 20-22" barrels) so I get a bit more MV but that's about where I'd expect you to be for 18". Node for 18" and Lrx 2340-2380.
Also note that your chrono tests are only for 3 rounds, so they are a beginning guide but the sd's won't mean much, the sample population is too small. I do that sometimes too but use the results only as a starting guide, to see how my can of powder, and my barrel, react to the loads, as each barrel is different.
I have not loaded nor shot the lrx, but again with an 18" barrel don't know I would even try it. Maybe as a cns load.
Another option is 90 gr TNT, which is a popular pig bullet, see all the videos on here by DNS and buddies. If it's hard to find then Nosler has a 90 gr Varmegeddon (even their "seconds" on shooters pro shop), the 90's at grendel velocities work even though they are considered "varmint" pills.
Saami max for the Grendel is 52 ksi, using QL you have some issues that can prevent accurate models, chiefly for the small-volume/fat body cartridges, QL has trouble without some significant tweaks. If you haven't done these/don't know about them you're probably not getting the accuracy you need. I had to adjust the sebert factor and use a larger than "saami" volume to make Grt workable, but only as a rough guide.
Using a bolt action rifle? then there is some room at the top of the pressure limits since Saami is based on not overstressing the lugs of an AR bolt/chamber. Not a big bunch however.
Finally, Barnes lists min expansion data but it is for tests in water, tests or actuals in flesh will need more MV; so for the 100 ttsx I use ~2150 as my practical limit, with 2000 as an absolute bottom floor.
Anyway, several pointers/suggestions for you to consider.
ps, if you don't have to use lead free (Tx right?), consider either 100 gr Eldm's (now available) or the 129 Ablr, which opens up down to 1300 ft/sec. the 100 eldm will give you some more MV and range to work with, and Ablr would give longer ranges.
I load longer than book for the 100 ttsx (about 2.275) in order to do that (for 20-22" barrels) so I get a bit more MV but that's about where I'd expect you to be for 18". Node for 18" and Lrx 2340-2380.
Also note that your chrono tests are only for 3 rounds, so they are a beginning guide but the sd's won't mean much, the sample population is too small. I do that sometimes too but use the results only as a starting guide, to see how my can of powder, and my barrel, react to the loads, as each barrel is different.
I have not loaded nor shot the lrx, but again with an 18" barrel don't know I would even try it. Maybe as a cns load.
Another option is 90 gr TNT, which is a popular pig bullet, see all the videos on here by DNS and buddies. If it's hard to find then Nosler has a 90 gr Varmegeddon (even their "seconds" on shooters pro shop), the 90's at grendel velocities work even though they are considered "varmint" pills.
Saami max for the Grendel is 52 ksi, using QL you have some issues that can prevent accurate models, chiefly for the small-volume/fat body cartridges, QL has trouble without some significant tweaks. If you haven't done these/don't know about them you're probably not getting the accuracy you need. I had to adjust the sebert factor and use a larger than "saami" volume to make Grt workable, but only as a rough guide.
Using a bolt action rifle? then there is some room at the top of the pressure limits since Saami is based on not overstressing the lugs of an AR bolt/chamber. Not a big bunch however.
Finally, Barnes lists min expansion data but it is for tests in water, tests or actuals in flesh will need more MV; so for the 100 ttsx I use ~2150 as my practical limit, with 2000 as an absolute bottom floor.
Anyway, several pointers/suggestions for you to consider.
ps, if you don't have to use lead free (Tx right?), consider either 100 gr Eldm's (now available) or the 129 Ablr, which opens up down to 1300 ft/sec. the 100 eldm will give you some more MV and range to work with, and Ablr would give longer ranges.
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