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Joined: Dec 2002
Posts: 32,147
Campfire 'Bwana
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Campfire 'Bwana
Joined: Dec 2002
Posts: 32,147 |
Have you considered the 80 grain TTSX? Speed?, check. Penetration?, check. Accuracy?, depends on the rifle. On W.T.'s and such, I don't use very low S.D. bullets at hyper velocity. I don't know the S.D. of that bullet, but if below .200 and at high velocity, I'd save'em for 'yotes and such, not use them on W.T.'s... I had a bad result on a W.T.with a 80 TTSX at 3,600 fps out of my .240 Wby. Once was enough. Just a series of one, but left a lasting impression. Too many better options to go back. DF I prefer the 100 grain BT, 100 grain Partition, or 110 grain AB in the 257 Roberts. Actually both, too much expansion/not enough expansion. It's just where it happened. Huge blast effect with double hands full of blood clot from chest wall. Not much damage inside the chest, just a pass thru. This 100# doe, ran 100 yds., found her in the woods after dark with flashlights. The bullet seemed to have expended most of its energy outside the chest wall, wasn't much left to mess up lungs, heart, etc. Very accurate in that gun. I moved on to the 100 NPT, which the .240 likes even better and it kills MUCH more efficiently. The 100 TTSX at 3,250 fps out of the Roberts is a different matter. It penetrates, devastates, kills quickly with authority. I'd like to hear opinions about very low S.D. monos at hypervelocity as deer loads. DF ![[Linked Image]](https://i.imgur.com/1xuSpmUb.jpg) ![[Linked Image]](https://i.imgur.com/cz5eXOgb.jpg) It would seem, on the surface, that the 80 grain TTSX would be a great .257" bore bullet. Very fast, plenty of penetration by design, and situational accuracy. Since S.D. is a calculation that doesn't take bullet construction into account, I wonder if it a meaningful/germane number when monolithic bullets are part of the equation. (80/7000) / (.257 x .257) 0.01143 / 0.06605 0.173
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Joined: Nov 2010
Posts: 37,084
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,084 |
Have you considered the 80 grain TTSX? Speed?, check. Penetration?, check. Accuracy?, depends on the rifle. On W.T.'s and such, I don't use very low S.D. bullets at hyper velocity. I don't know the S.D. of that bullet, but if below .200 and at high velocity, I'd save'em for 'yotes and such, not use them on W.T.'s... I had a bad result on a W.T.with a 80 TTSX at 3,600 fps out of my .240 Wby. Once was enough. Just a series of one, but left a lasting impression. Too many better options to go back. DF I prefer the 100 grain BT, 100 grain Partition, or 110 grain AB in the 257 Roberts. Actually both, too much expansion/not enough expansion. It's just where it happened. Huge blast effect with double hands full of blood clot from chest wall. Not much damage inside the chest, just a pass thru. This 100# doe, ran 100 yds., found her in the woods after dark with flashlights. The bullet seemed to have expended most of its energy outside the chest wall, wasn't much left to mess up lungs, heart, etc. Very accurate in that gun. I moved on to the 100 NPT, which the .240 likes even better and it kills MUCH more efficiently. The 100 TTSX at 3,250 fps out of the Roberts is a different matter. It penetrates, devastates, kills quickly with authority. I'd like to hear opinions about very low S.D. monos at hypervelocity as deer loads. DF It would seem, on the surface, that the 80 grain TTSX would be a great .257" bore bullet. Very fast, plenty of penetration by desigh, and situational accuracy. Since S.D. is a calculation that doesn't take bullet construction into account, I wonder if it a meaningful/germane number when monolithic bullets are part of the equation. (80/7000) / (.257 x .257) 0.01143 / 0.06605 0.173 I don't know. To me, it's sorta like flooding and drainage. Engineers can tell us where the water should go. I wait for a big rain, go out and see where it went... I'm guessing about the perceived "imbalance" between low bullet mass/S.D. combined with hypervelocity. It would depend on terminal performance and on the critter being studied. Those very light, very fast monos would probably devastate a 'yote. I'm questioning their efficiency on BG, and from only one observation on one WT. That was enough for me to move on to other options. Others may report different results. I would be interested in their observations. DF
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Joined: Dec 2002
Posts: 32,147
Campfire 'Bwana
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Campfire 'Bwana
Joined: Dec 2002
Posts: 32,147 |
I'm really happy with the 110 grain AB in most of my .257" bore rifles as it does everything that I need a .257" medium game bullet to do and it does those things very well.
The exception being 1-14" ROT .257" bore rifles. I like the 75 and 85 grain Barnes original X bullets and the 87 grain Speer HOTCORE in those rifles.
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Joined: Jul 2008
Posts: 2,961
Campfire Regular
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Campfire Regular
Joined: Jul 2008
Posts: 2,961 |
Have to agree with you on the 110 grain AB.... I am running them in 1-9 twist barrels.
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Joined: Nov 2010
Posts: 37,084
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,084 |
Have to agree with you on the 110 grain AB.... I am running them in 1-9 twist barrels. What's your pet load for the 110 NAB? DF
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Joined: Dec 2014
Posts: 2,961
Campfire Regular
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Campfire Regular
Joined: Dec 2014
Posts: 2,961 |
I'm using 43gr of IMR 4350 CCI 200 primer and the 110 NAB. The rifle is a custom on a 1909 Argentine Mauser action and IIRC a 1:9 twist rate.
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Joined: Nov 2010
Posts: 37,084
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,084 |
All 4350 powders seem to work well with heavier bullets in the Roberts. H-4350 is hard to find, IMR-4350 isn't as temp resistant.
So, it may be time to look at similar burn rate powders with good temp profile, such as 4451, RL-16, etc. H100V is a good one, probably the fastest, just not as temp resistant. Some say that about RL-17.
DF
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Joined: Jun 2003
Posts: 42,607
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2003
Posts: 42,607 |
Have you considered the 80 grain TTSX? Speed?, check. Penetration?, check. Accuracy?, depends on the rifle. On W.T.'s and such, I don't use very low S.D. bullets at hyper velocity. I don't know the S.D. of that bullet, but if below .200 and at high velocity, I'd save'em for 'yotes and such, not use them on W.T.'s... I had a bad result on a W.T.with a 80 TTSX at 3,600 fps out of my .240 Wby. Once was enough. Just a series of one, but left a lasting impression. Too many better options to go back. DF I prefer the 100 grain BT, 100 grain Partition, or 110 grain AB in the 257 Roberts. Actually both, too much expansion/not enough expansion. It's just where it happened. Huge blast effect with double hands full of blood clot from chest wall. Not much damage inside the chest, just a pass thru. This 100# doe, ran 100 yds., found her in the woods after dark with flashlights. The bullet seemed to have expended most of its energy outside the chest wall, wasn't much left to mess up lungs, heart, etc. Very accurate in that gun. I moved on to the 100 NPT, which the .240 likes even better and it kills MUCH more efficiently. The 100 TTSX at 3,250 fps out of the Roberts is a different matter. It penetrates, devastates, kills quickly with authority. I'd like to hear opinions about very low S.D. monos at hypervelocity as deer loads. DF Dirt, how in the Sam Hell, do you wring 3250 out of a roberts!
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
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Joined: Nov 2010
Posts: 37,084
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,084 |
Have you considered the 80 grain TTSX? Speed?, check. Penetration?, check. Accuracy?, depends on the rifle. On W.T.'s and such, I don't use very low S.D. bullets at hyper velocity. I don't know the S.D. of that bullet, but if below .200 and at high velocity, I'd save'em for 'yotes and such, not use them on W.T.'s... I had a bad result on a W.T.with a 80 TTSX at 3,600 fps out of my .240 Wby. Once was enough. Just a series of one, but left a lasting impression. Too many better options to go back. DF I prefer the 100 grain BT, 100 grain Partition, or 110 grain AB in the 257 Roberts. Actually both, too much expansion/not enough expansion. It's just where it happened. Huge blast effect with double hands full of blood clot from chest wall. Not much damage inside the chest, just a pass thru. This 100# doe, ran 100 yds., found her in the woods after dark with flashlights. The bullet seemed to have expended most of its energy outside the chest wall, wasn't much left to mess up lungs, heart, etc. Very accurate in that gun. I moved on to the 100 NPT, which the .240 likes even better and it kills MUCH more efficiently. The 100 TTSX at 3,250 fps out of the Roberts is a different matter. It penetrates, devastates, kills quickly with authority. I'd like to hear opinions about very low S.D. monos at hypervelocity as deer loads. DF Dirt, how in the Sam Hell, do you wring 3250 out of a roberts! I will thank gunner500 for that load. It's just H100V performance, one of those new, wonder powders that does amazing things. High velocity without pressure issues, relatively low S.D/E.S. with excellent accuracy out of a 24" Brux. As JB has written, these type powders often are not temp resistant. He reported that H100V was one of the most temp sensitive powders he's tested. In my hunting climate, that's not an issue. In colder climates, I would probably use something else. A 100 gr. TTSX at 3,250+ fps is a real killer. DF ![[Linked Image]](https://i.imgur.com/tZf5e35.jpg)
Last edited by Dirtfarmer; 04/18/18.
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Joined: Jan 2009
Posts: 1,473
Campfire Regular
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Campfire Regular
Joined: Jan 2009
Posts: 1,473 |
My Roberts favored H4831 with 115 NBT's and 120 NPT's
Yes. I loaded H4831sc with 115gn Ballistic Tips. Very good performance on pigs but I haven't shot a deer with them. The 100gn Swift Scirocco is an excellent bullet in the Roberts.
Last edited by Elvis; 04/18/18.
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Joined: Nov 2010
Posts: 37,084
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,084 |
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