300 wm and retumbo
- Thread starter str8meat
- Start date
i have been playing with retumbo in my #1 for a couple months and the best load i have ever found for this rifle is 90gr retumbo behind 165bt in a nosler case. i don't think it is supposed to work from what others say but it seems to repeat the accuracy everytime i take it to the range.
man-o-man,90grains is really a case filler. :grin:
man-o-man,90grains is really a case filler. :grin:
- Thread starter
- #4
Ridge_Runner
Handloader
- Sep 29, 2006
- 1,395
- 770
according to this data 84 gr. is extremely compressed
http://www.reloadersnest.com/detail.asp ... oadID=9415
RR
http://www.reloadersnest.com/detail.asp ... oadID=9415
RR
- Nov 4, 2004
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beretzs":3k6gvyqj said:
I use Retumbo in my 338 RUM and 98.6 grs fills the case pretty full so I am thinking 90.0 grs in the 300 WM is a typo.
JD338
DrMike
Ballistician
- Nov 8, 2006
- 37,612
- 6,815
Because of the potential for settling, etc., I generally consider that ~114% case fill is maximum for a charge. Ninety grains of Retumbo with a 165 BT would be 116%+ of case capacity on a 300 Win Mag. using Winchester brass. However, with Norma brass, QL projects that it would be only 114% of case capacity. It would be a compacted load, but it should all go in the case. With Remington brass, it doesn't appear to be doable, as it is 125% of case capacity. Moreover, because of case volume, ninety grains with Winchester, Remington or Federal brass are all projected to generate excessive pressures. Yet, with Norma brass, the projection of a charge of ninety grains is well within pressure limits (>60K psi). Fascinating stuff. It may not be the best powder, but it depends in no small measure on chamber size and brass used.
- Thread starter
- #14
i think it will do great with the 200grainers, when i run through all my 165's im going to dump some behind the 200 part.going to chrono the 165's one of these days. they should be close to 3300-3340 with a 26'' pipe. i am looking forward to loading the 200's with this powder.
my load is nosler brass 2.610 came from nosler at 2.600??
nosler ballistic tip 165
90gr retumbo max for my ruger#1. pressure signs at 90.5 start low
aol:3.550
my load is nosler brass 2.610 came from nosler at 2.600??
nosler ballistic tip 165
90gr retumbo max for my ruger#1. pressure signs at 90.5 start low
aol:3.550
- Nov 4, 2004
- 25,738
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Mike,
Great points!
Man, talk about putting 10 lbs in a 5 lb sack. :mrgreen:
I always had good luck with RL 22. I would think IMR 4350 and H1000 would be good powders for the 300 WM and faster burn rate than Retumbo.
JD338
Great points!
Man, talk about putting 10 lbs in a 5 lb sack. :mrgreen:
I always had good luck with RL 22. I would think IMR 4350 and H1000 would be good powders for the 300 WM and faster burn rate than Retumbo.
JD338
DrMike
Ballistician
- Nov 8, 2006
- 37,612
- 6,815
As I said, Retumbo "may not be the best powder." (in fact, I believe RL22 is a superior powder for the case expansion), but it would work provided there is sufficient case capacity. QL indicates that Norma brass (because of thickness and standards employed) has sufficient case capacity for Retumbo. It would appear that Nosler brass also has a similar case capacity. It is another cautionary note that whenever someone changes any component, they should drop back in charge weight and work up the load again to ensure safety. Winchester brass is not Remington brass is not Federal brass is not Norma brass is not Nosler brass. I could imagine that someone might work up a load using Norma brass and "assume" that the same maximum load will work wonderfully with Remington brass. It could introduce a rather exciting (unanticipated) element to an otherwise pleasant hunt.
agreed, i also think that reloader 22 is about as good as it gets for the winnie. there are better powders than retumbo for the 300 especially for the lighter bullets. but make no mistake for the 165 in my ruger it plain ass shoots and my #1 is pretty picky. :wink:
