That’s a great looking load with 250gr. What barrel length do you have?
Which bullet nose style ? The 250gr spitzer is 3.33" OAL and the 250gr RNSP is 3.17" OAL according to Ken Waters Pet Loads. Win brass.... most accurate load was 52gr of IMR 4064/2280fps Best Load was the now defunct IMR 4320-56gr/2535fps OAL will vary gun to gun but it's a starting place.
Here's the data I started with:
https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/rifle/35_Whelen_250.pdf
54.5 grains of IMR 4064. 2450 fps out of a 22 inch Krieger barrel. Lights out load, nothing has ever walked away from it. End to end on an 1800 lb moose. Haven't ever changed the load in 34 yrs
Is a good post that points to issue a new hand loader will have to deal with. I do not have complete collection of old Speer manuals - but I have #7 which was published in 1966. I note that for 250 grain Speer Spitzer, they listed 54.0 min for IMR4064, and 58.0 Max ("Gov't Issue" cases and CCI 200 primers). Same listings in Speer #5 Manual from 1961 ("Arsenal" cases and CCI 200 primers). Then, a big jump in "age" - my next Speer Manual is #14, was published in 2007. Same bullet, same IMR4064 powder (Remington case, CCI 200/250 primers) - shows 49.0 as minimum and 53.0 as Maximum - same as on chart linked above to current Speer website. So why the change? First ones maybe done with home-done pressure signs, and later ones done with actual pressure test device? Cases might have had different volumes - then to now? Powder was changed? Primers are "hotter" today? Poster above did not mention how many times his load has been fired in past 34 years (since 1988) - maybe he is within the safety factor margin of his rifle design, or maybe modern Speer numbers actually are "too" mild?
An observation - in that #14 Manual - on page ii - a "Disclaimer" - "The data contained herein replaces, supersedes and obsoletes all data previously published ..." So, it appears that Speer (Omark Industries, Blount International, or whomever owns them today) DOES NOT stand behind what was given as Speer loadings in previous manuals. I have no clue what latest Speer manual number is, but likely has a similar disclaimer, I suspect???
Is a good post that points to issue a new hand loader will have to deal with. I do not have complete collection of old Speer manuals - but I have #7 which was published in 1966. I note that for 250 grain Speer Spitzer, they listed 54.0 min for IMR4064, and 58.0 Max ("Gov't Issue" cases and CCI 200 primers). Same listings in Speer #5 Manual from 1961 ("Arsenal" cases and CCI 200 primers). Then, a big jump in "age" - my next Speer Manual is #14, was published in 2007. Same bullet, same IMR4064 powder (Remington case, CCI 200/250 primers) - shows 49.0 as minimum and 53.0 as Maximum - same as on chart linked above to current Speer website. So why the change? First ones maybe done with home-done pressure signs, and later ones done with actual pressure test device? Cases might have had different volumes - then to now? Powder was changed? Primers are "hotter" today? Poster above did not mention how many times his load has been fired in past 34 years (since 1988) - maybe he is within the safety factor margin of his rifle design, or maybe modern Speer numbers actually are "too" mild?
An observation - in that #14 Manual - on page ii - a "Disclaimer" - "The data contained herein replaces, supersedes and obsoletes all data previously published ..." So, it appears that Speer (Omark Industries, Blount International, or whomever owns them today) DOES NOT stand behind what was given as Speer loadings in previous manuals. I have no clue what latest Speer manual number is, but likely has a similar disclaimer, I suspect???
I went as high as 56 grains but started seeing pressure signs creeping in. Dropped to 54.5 and kept it at that...on really hot days, you can see a tiny bit more primer flattening
hey Paul, what are you shootin with the Whelen? fur or paper stuff?