Huntz
Well-Known Member
What can one expect from a 24" barrel firing 140 grain bullets?I am thinking of re-chambering a Tikka 6.5CM .I will convert the bolt stop to a LA.Thanks ahead,Huntz
Realistic 6.5X284 MV?
- Thread starter Huntz
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Hard rock
Well-Known Member
I haven't loaded 140s because I shoot monos I have loaded the 121 gr hammer too 3342 fps in my 1-9 twist . In a 1-8 twist you would be better off with the 123 absolute and 109 gr absolute and you could load with even more vel . I'll make a educated guess of at least 200 fps increase with 140 conventional bullets. Use Lapua brass and you can really push it.
Marky_mark
Well-Known Member
3000 fps
2900-3000, my 26" shoots 143eldx at 2950 fps with retumbo with no pressure. I am sure I could push it to 3000 but I don't want too.
My 24" Savage 111 LRH shoots the 143gr ELDX at 2960 and the 140gr Speer Gold Dot at 3000, both with RL23, I am just starting load work up with a SA Savage with a 25" Xcaliber barrel from Crown Ridge Barrels, I have modified so that OAL is 3.02-3.04, this barrel was reamed with a 6.5x284 WIn reamer so as to shorten the throat.
I would also like to add if I may that I will be doing the same with a Tikka T3x Superlite in 6.5CM. Talked with Tyler at Capital sports here in Helena and he said it would be totally doable with a new bolt stop and a longer mag.
Powder choice makes a huge difference. If you are conservative and use some of the Hodgdon Extreme powders 2800-2900. If you are more adventurous and use some of the Reloader powders 3000-3100.
How your chamber is cut makes a difference as well.
How your chamber is cut makes a difference as well.
Marky_mark
Well-Known Member
N570 will get you to 3000 fps with 156's
Huntz
Well-Known Member
Is there more than one type reamer?I see it listed as 6.5X284 Winchester or 6.5X284 Norma.
Since there was just recently SAAMI standardization of the 6.5-284 there are tons of different chambers out there. My rifle was chambered by Hart Rifles and their reamer was set up for 140 VLDs and had the bearing surface placed at the neck/shoulder junction instead of jammed down into the case. I don't recall what the freebore was but I'd say is was likely in the .196-.204 range if I were guessing.
Wedgy
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You should get to ~3,000 with Reloder 26 but watch out for pressure spikes above ~85F but it is very stable below that. I think I ran out of case capacity with N570. I run H1000 at 3,016 fps with a 26" barrel, Retumbo should also get you almost there with a 24" barrel.
Justice1327
Well-Known Member
My 26" brl, 1:8, 140gr, w/ RL26 @ 53.2 gr, gets me 3060fps
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