Load Data 357mag 200gr Boolit

[2ndAmendmentNut]

Looking for safe load data for a 357 magnum with a 200 grain boolit. I would like to duplicate the Double Tap Ammo factory load. My gun is a Ruger GP100 4”.

[lifeon2]

All my load data for jacketed bullets shows vihtavuori

N110 11.4 - 12.4 1107 - 1204 fps

N105 8.4 - 9.4 1020 - 1123 fps

3N37 6.4 - 7.2 891 - 991 fps

N350 6.2 - 7.1 838 - 966

If you are using cast boolits please let me know what powders you have as the list is long

[2ndAmendmentNut]

Yes I had planned on using cast boolits. The powders I have on hand that I think might work are AA#9, H110, and Blue Dot. My bass will be Remington and I have both mag and standard CCI small pistol primers.

[44mag1]

Ive used 14 grains of 296 in a s&w 28. not sure if I would try it in a smaller revolver.

[lifeon2]

I have h110 and blue dot as follows

H110 11.5grns 1212 fps

blue dot 7.5 - 8.2 grns 1124 - 1225 fps

[2ndAmendmentNut]

Lifeon2,
Could you please list your sources. I don’t doubt you it’s just I want to play it safe.

[LeadThrower]

I've used up to 10.2 gr of A9 to power a 215 grain cast in my GP100 6". I recently chrony'd some loads with 10.0 gr of A9 and it leaves the barrel close to 1100 fps, if I recall correctly. That was with non-magnum primers 'cause it's all I had on hand.

No difficult extractions, but primers were beginning to show flattening. I recall folks here saying that revolver loads should be considered too hot at the point of difficult extraction, though not necessarily at the point of flattened primers. (although I don't have reason to load hotter.)

[2ndAmendmentNut]

Thank you, but I would like to stick to the books when it comes to handloading. Are there any recent load manuals with this kind of data?

[358wcf]

What? You don't remember 1964?? I certainly do!! Great times!
Manual shows starting loads of:
Bullseye 2.5gr 550fps
Unique 3.5gr 550fps

Loads approached 900fps at max- you need to find your own max--
Using Lyyman 35875 cast bullet at 200grains-

Lots of old manuals eliminate guesswork- and promote safe loading!!!!

358wcf

[trk]

Be sure and have a good crimp. I've found that the heavier slugs tend to work forward as the others are launched.