I like Seafire's Blue Dot .22-250 loads. It also used to be my go-to powder for .357 Magnum back when it was Hercules.
I have this quote in a text file; pretty sure it's from 24 hour campfire:
"A Rule of Thumb for bottleneck rifle rounds is to fill a case with BlueDot and then weigh that amount. Use 40% of the weight as your Start load, and 60% as your Max. Use caution over 50% as pressures can mount quickly.
That works with most bullets of a nominal weight for that round.
-Rocky Raab"
And here is a pretty comprehensive post by Seafire, on Blue Dot in .22-250:
"For inquiring minds:
re: 22.250
Blue Dot Range Report: 22/250
Firearm Used: Ruger 77 Mk 2
Barrel: 22 inch sporter weight
Case: Remington
Range Tested: 7 grains to 20 grains. 20 % ( 6.6 grains) 60 % ( 19.8 grains)
Full Case Capacity to Rim: 33 grains/
Bullets Used in Test:
46 Win HP, 50 Hornady SP, 52 Sierra HP Match, 55 Win FMJ, 60 Hornady SP
63 Sierra SMP
Test Results:
I. 46 grain Winchester Hollow Point, Win Large Pistol Primer
1. 7 grs: 1721 fps
2. 8 grs: 1895 fps
3. 9 grs: 2095 fps
4. 10 grs: 2264 fps
5. 11 grs: 2390 fps
6. 12 grs: 2537 fps
7. 13 grs: 2675 fps
8. 14 grs: 2781 fps
9. 15 grs: NO Reading
10. 16 grs: 3063 fps
11. 17 grs: 3177 fps
12. 18 grs: 3274 fps
13. 19 grs: 3388 fps ( Consider Max)
14. 20 grs: 3440 fps ( Extractor Mark, Scrapped Case)
II. 50 grain Hornady SP, Win Large Rifle Primer
1. 7 grs: 1722 fps
2. 8 grs: 1911 fps
3. 9 grs: 2057 fps
4. 10 grs: 2206 fps
5. 11 grs: 2328 fps
6. 12 grs: 2473 fps
7. 13 grs: 2627 fps
8. 14 grs: 2729 fps
9. 15 grs: 2856 fps
10. 16 grs: 2940 fps
11. 17 grs: 3116 fps
12. 18 grs: 3181 fps
13. 19 grs: 3271 fps
14. 20 grs: 3354 fps
With this bullet, all the way to 20 grains was reached ( 60%). However, I would recommend max being set at 19 grains or less.
III Sierra 52 grain Hollow Point Match Win Large Pistol Primer
1. 7 grs: 1676 fps
2. 8 grs: 1841 fps
3. 9 grs: 1998 fps
4. 10 grs: 2127 fps
5. 11 grs: 2311 fps
6. 12 grs: 2416 fps
7. 13 grs: 2551 fps
8. 14 grs: No Read
9. 15 grs: 2795 fps
10. 16 grs: 2935 fps
11. 17 grs: 3029 fps
12. 18 grs: 3127 fps
13. 19 grs: 3252 fps
14. 20 grs: 3297 fps
This bullet also reached the 20 grains mark ( 60 %) . However once again I recommend max being set at 19 grains or less.
IV Winchester 55 gr FMJ, Win Large Pistol Primer
1. 7grs: 1636 fps
2. 8 grs: 1800 fps
3. 9 grs: 1986 fps
4. 10 grs: 2126 fps
5. 11 grs: 2247 fps
6. 12 grs: 2392 fps
7. 13 grs: 2504 fps
8. 14 grs: 2631 fps
9. 15 grs: 2738 fps
10. 16 grs: 2872 fps
11. 17 grs: 3003 fps
12. 18 grs: 3095 fps
13. 19 grs: 3203 fps
14. 20 grs: 3250 fps
As again Noted, this bullet also achieved reaching the 20 grain Mark ( 60%). However once again I recommend max capacity at 19 grains or less.
V. Hornady 60 grain SP, Win Mag Rifle Primer
1. 7 grs: 1587 fps
2. 8 grs: 1769 fps
3. 9 grs: 1901 fps
4. 10 grs: 2034 fps
5. 11 grs: 2162 fps
6. 12 grs: 2290 fps
7. 13 grs: 2406 fps
8. 14 grs: 2489 fps
9. 15 grs: 2618 fps
10. 16 grs: 2735 fps
11. 17 grs: 2832 fps
12. 18 grs: 2832 fps
13. 19 grs: 3058 fps ( considered max)
14. 20 grs: 3119 fps ( primer leaked, extractor marks, scrapped case)
Max was achieved at 19 grains. Recommend Max load at 19 grains or less.
Based on tree used as back stop, which had a 6 inch diameter to it, bullets at 15 grains of powder and up were penetrating the tree completely. Based on this I would recommend this point as a potential deer load for youths, keeping range within 100 to 125 yds or so ( 30/30 range). The 63 grain Sierra SMP showed a lot more damage to the tree than did the Hornady, and at a much lower velocity. Use on deer is the personal choice of the shooter or adult. Some argue against 22 Center fire on deer and others are just fine with it. Key is shot placement and range limitation. I am just reporting damage to media, and penetration that I am passing on to the reader.
VI. Sierra 63 grain Semi Pointed ( SMP) Win Mag Rifle Primer
1. 7 grs: 1455 fps
2. 8 grs: 1607 fps
3. 9 grs: 1848 fps
4. 10 grs: 1860 fps
5. 11 grs: 2034 fps
6. 12 grs: 2176 fps
7. 13 grs: 2327 fps
8. 14 grs: 2443 fps
9. 15 grs: 2578 fps
10. 16 grs: 2668 fps
11. 17 grs: 2787 fps
12. 18 grs: 2850 fps
13. 19 grs: 2958 fps ( Consider Maximum!, NO problems observed)
14. 20 grs: 2982 fps ( Popped primer, jammed bolt)
Conclusions:
For training and starting out a youth, I consider the 22/250 a better first choice to start out with, based on the test results as compared to a 223. The 223 has the economy of cheaper brass, but the 22/250 I thought offered more flexibility by being able to achieve higher velocities with heavier bullets than the 223 achieves.
For training of youths to deer hunt, the 63 grain bullet offered a lot of promise of everything tested. Results for a 64 grain Winchester would be close to the same, just recommend working up. Start looking for max with 18 grains or so. As one can see, the increase in fps is not that much, and would make no real world difference, as I consider that 200 yds would be max range. I also feel that training a youth not to take shots over that distance is a responsible habit for an adult to teach younger shooters. Let them learn with experience and practice to learn to shoot at longer ranges.
The 22/250 can be loaded down to levels that are between a 22 Long Rifle and a 22 Mag.
The recoil is very low, but also so is the noise at these levels. Especially the 10 grain loads and under. It can also be enjoyable for an adult. My own 22 mags are going to get dusty, as these loads are not only cheaper to shoot, but are more accurate\85 plus one can have a bullet of his choice instead of what the factory picks to load. At the lower volumes, such as 7 grains and up, these can also make a very satisfactory load for Squirrel hunting, or similar sized game at appropriate ranges. Consult a trajectory chart in some of the commercially available reload manuals. Even at 2000 fps or under, these would make good loads for calling coyotes if you can bring them in at 100 yds or so.
Game bullets would have the punch to drop a coyote at those velocities.
Important Notes:
These loads were tested in cool weather, moist outside and around the 55 to 60 degree ranges. Work up if the higher loads near max are to be used in hot weather.
Bullets were seated out to the magazine length in the Ruger. If your rifle has a tight neck, or a shorter chamber ( Rugers are generous) then work up your loads. Also seating bullets deeper can increase pressures.
Remember Blue Dot is a faster powder. However no filler is needed and I have tested it down to just 10 % of load capacity ( 3.3 grains and it worked just fine). It is not powder position sensitive in the case either.
This data represents data that I have observed. It is shared as a point of reference.
Outcomes are the responsibility of each handloader, who should be careful in his work.
The 22/250 showed me a lot of flexibility here, moreso than the 223 even.
It would be my pick as a better choice for a first rifle for a youth, utilizing this gathered test data.
Cheers and Good shooting
I can extropolate charges that would work in the fireball case, but in doing so, I know I'll really get flamed by the naythsayers...
Blue Dot is a pretty consistent and predictable powder..
a couple of examples are;
in a 308 sized case, regardless of bullet weights used or regardless of caliber, 22 grains of Blue Dot is the maximum amount before you start popping primers...
in a 6.5 x 55 case or a 57 mm case, such as the 7 x 57, 6mm Rem, 257 Roberts, 8 x 57 Mauser.. 24 grains of Blue Dot is max, regardless of caliber or bullet weight...
blue dot prefers shorter fatter cases...
it really likes Rem BR cases or PPC cases, or the Winchester Short mags and Super Short Mag cases.....
naturally since it is considered a pistol and shotgun powder, it also performs well in any straight walled case, like a 444, or 45/70 style case...375 Win, 38/55 etc..
The 60 % headwall capacity applies to some cases and the taller they are ( say 06 vs 308) I recommend 50% capacity to the headwall...
key is don't start at the top load recommendation on any powder.. work up...
all Blue Dot data I have ever posted, I have gone beyond what I list as maximum... I noticed lose primers beyond that or no appreciable increase in velocity...
for 06 sized cases and Magnums, I have started to use SR 4759, especially after someone blew a mag case by double charging it...
but still... just proves folks have to pay attention to what they are doing...regardless of type of powder.."