22-250 6.5 twist. Thoughts?

[Fiftydriver]

Update
H4350 88 eldm
Started low at 30 grains up to a compressed 38 grains. .020 off. No pressure. Got just over 3200 and held together. About 70 rounds through it now. Settled at 36.5 running at 3190. Grouping in the .4 range. Gonna mess with seating. Just happy they're holding together cause I got lots of em.

3200 fps is about the max i have found that worked well with heavy 224 bullets in fast twist barrels. Problem is all these bullets are designed for the 223/5.56 and as such designed for 2500-2700 fps levels. When i was designing and testing my 224 Allen Mag many years back, i kept hitting this 3200 fps wall. Under that they would shoot great, above that dusted most heavy bullets. At that time my good Friend Richard Graves, originator of Wildcat Bullets made me some 100 and 107 gr heavy jacketed 224 bullets. Even those had issues but allowed 3400 fps. Still very finicky
we need the bullet makers to design a good hunting bullet with heavier jacket to be used at 3300-3500 fps and the rpm levels associated with that speed. Solids this small in caliber just give up A LOT in the BC department……

 

[VLD Pilot]

3200 fps is about the max i have found that worked well with heavy 224 bullets in fast twist barrels. Problem is all these bullets are designed for the 223/5.56 and as such designed for 2500-2700 fps levels. When i was designing and testing my 224 Allen Mag many years back, i kept hitting this 3200 fps wall. Under that they would shoot great, above that dusted most heavy bullets. At that time my good Friend Richard Graves, originator of Wildcat Bullets made me some 100 and 107 gr heavy jacketed 224 bullets. Even those had issues but allowed 3400 fps. Still very finicky
we need the bullet makers to design a good hunting bullet with heavier jacket to be used at 3300-3500 fps and the rpm levels associated with that speed. Solids this small in caliber just give up A LOT in the BC department……

I have found the 8 twist to be the best all all-round choice for the larger .224 cartridges. Some have said the 7-7.5 works well but if I can get great stability with an 80-88 grain bullet with an 8 twist, why go faster ? Faster twists with smaller caliber bullets going beyond 3400 fps is asking for trouble eventually. Few hundred bullets down the barrel and bad things happen unless your shooting solids. Some get lucky and never see problems but many do.

 

[dustbag]

Read awhile back about number of grooves affecting bullet separation too.

 

[Mike D Texas]

3200 fps is about the max i have found that worked well with heavy 224 bullets in fast twist barrels. Problem is all these bullets are designed for the 223/5.56 and as such designed for 2500-2700 fps levels. When i was designing and testing my 224 Allen Mag many years back, i kept hitting this 3200 fps wall. Under that they would shoot great, above that dusted most heavy bullets. At that time my good Friend Richard Graves, originator of Wildcat Bullets made me some 100 and 107 gr heavy jacketed 224 bullets. Even those had issues but allowed 3400 fps. Still very finicky
we need the bullet makers to design a good hunting bullet with heavier jacket to be used at 3300-3500 fps and the rpm levels associated with that speed. Solids this small in caliber just give up A LOT in the BC department……

I've been shooting 90 grain Gold Dots in my 22-250AI with a 7 twist with great success. It just doesn't carry the BC for truly long range work but it slams pigs and deer.

 

[Fiftydriver]

Read awhile back about number of grooves affecting bullet separation too.

Ot so much number of groove as much we it is bullet baring surface compression that causes problems. Did some full reports on this many years back.

 

[Fiftydriver]

I've been shooting 90 grain Gold Dots in my 22-250AI with a 7 twist with great success. It just doesn't carry the BC for truly long range work but it slams pigs and deer.

Believe those are bonded core, helps a great deal