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OP
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So, what is everyone's favorite powder for Speer Grand Slams in the .257 Roberts?
Why is abbreviate such a long word
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Joined: Nov 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
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I don't shoot that bullet in my .257R., can't give you a fav.
I'd try H-4350. It does very well with the 115 NBT. H-100V worked well with the 100 TTSX.
StaBALL may be one to try. I got mine from Powder Valley, not sure if they still have it. Haven't shot it in the Roberts.
Some like H-4831 and RL-19. I tried RL-26. It left unburned granules in the chamber; I couldn't chamber the next round.
Maybe others will chime in.
DF
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Joined: Dec 2006
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Campfire Tracker
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Campfire Tracker
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120 partitions here but H4831 was the ticket from mine.
When I die I hope I don't start voting democrat.
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Campfire Outfitter
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Campfire Outfitter
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I tried the Grand Slams in my Roberts with less than inspiring results.
Dog I rescued in January
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OP
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I'll look at those. Everything is kinda thin on the ground here right now. I'll bet I can find some H-4831 though.
Why is abbreviate such a long word
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Joined: Nov 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
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I'll look at those. Everything is kinda thin on the ground here right now. I'll bet I can find some H-4831 though. Would probably work great. May be one to start with, stay with. DF
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I tried the Grand Slams in my Roberts with less than inspiring results. I got them REALLY cheap. $2.50 per box at an estate sale. So I figured they would be fine for our little Texas whitetails. Hell, deer aren't that hard to kill. I'm normally a 100 gr Ballistic Tip guy. I use a pretty mild load of 4320. It is loping along around 2,900. I rarely shoot over 125 yards when deer hunting on my lease.Little meat damage and they rarely run at all. I figured if nothing else I could shoot up some hogs with them.
Last edited by HadsDad; 09/07/20. Reason: Added information
Why is abbreviate such a long word
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Joined: Nov 2010
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Campfire 'Bwana
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Campfire 'Bwana
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You can find a load, make them work.
Price was right.
DF
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I have more than I care to admit.
Last edited by HadsDad; 09/07/20.
Why is abbreviate such a long word
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Joined: Nov 2010
Posts: 37,106
Campfire 'Bwana
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Campfire 'Bwana
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I have more than I care to admit. Card carrying Loony.... DF
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I have more than I care to admit. Card carrying Loony.... DF That was part of the problem honestly. I just wanted to know where to start.
Why is abbreviate such a long word
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Joined: Jul 2009
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Campfire Regular
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Campfire Regular
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I tried some 7828 in mine and it loved it. It also shoots several other powders ok.
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Campfire Tracker
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Campfire Tracker
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H4831 works great for 120s for me
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I tried some 7828 in mine and it loved it. It also shoots several other powders ok. What kind of velocities are you getting with the 7828?
Why is abbreviate such a long word
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Joined: Sep 2015
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H4831 works great for 120s for me I was thinking about trying IMR 4831 I don't have any of the H-4831. What kind of velocities are you getting with the H-4831?
Why is abbreviate such a long word
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Campfire Regular
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Campfire Regular
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In my 257AI, RL22 & H4831sc produced the best velocity with 120gn Speers.
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Campfire Member
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Not a 257R but my 25.06 loves a full house of RL25 or RL22 with the Speer 120gr Hot -cors as well as the discontinued 120gr Deep Curls. In my experience both powders have always produced excellent results for me with bullets ranging from 110gr - 120grs in the .257 calibers.
Life's Tough, God's Good, Pray Hard!
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Joined: Sep 2015
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In my 257AI, RL22 & H4831sc produced the best velocity with 120gn Speers.
I'll have to see if I still have any RL-22.
Why is abbreviate such a long word
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Campfire 'Bwana
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Campfire 'Bwana
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I’m using up my RL-22, replacing it with RL-23.
Have a big can of MRP, very similar burn rate. It’s my go to Swede powder.
DF
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