30-30 what's best jump for LA Silhouette 125gr
-
- A Poster
- Posts: 152
- Joined: Fri Mar 24, 2017 8:29 am
30-30 what's best jump for LA Silhouette 125gr
After fairly extensive testing I settled on a load for my 30-30's
31.1-31.6 grains of W748, Fed210 primers, concentric cases .000- .003",
Sierra 125gr Hollow Point Flat Nose #2020
Using the Sierra 125gr Hollow Point Flat Nose #2020, my rifle shows 2.269" LNL (length of bulleted seated and just touching the rifling). The Overall length of the ammo is then 2.569", which is oversized for the minimum COAL 2.550
If I seat the bullet with .019 jump it meets the Max COAL (overall length) 2.550".
If I seat the bullet with .135 jump where case end meets the Cannelure (overall length) 2.415".
So a broad range of jump is possible. .019 to .135. I have not jump tested yet.
What's your jump and 100yard group sizes at 100 yards for the Sierra 125gr Hollow Point Flat Nose #2020?
31.1-31.6 grains of W748, Fed210 primers, concentric cases .000- .003",
Sierra 125gr Hollow Point Flat Nose #2020
Using the Sierra 125gr Hollow Point Flat Nose #2020, my rifle shows 2.269" LNL (length of bulleted seated and just touching the rifling). The Overall length of the ammo is then 2.569", which is oversized for the minimum COAL 2.550
If I seat the bullet with .019 jump it meets the Max COAL (overall length) 2.550".
If I seat the bullet with .135 jump where case end meets the Cannelure (overall length) 2.415".
So a broad range of jump is possible. .019 to .135. I have not jump tested yet.
What's your jump and 100yard group sizes at 100 yards for the Sierra 125gr Hollow Point Flat Nose #2020?
You do not have the required permissions to view the files attached to this post.
Last edited by shootmore on Wed Jun 30, 2021 7:53 am, edited 1 time in total.
-
- A Poster
- Posts: 169
- Joined: Fri Oct 31, 2014 12:57 pm
- Location: Great state of TEXAS!
Re: 30-30 what's best jump for LA Silhouette 125gr
Shoot what groups the best, and still cycle through action. Mine abt 2k into lands.
-
- A Poster
- Posts: 152
- Joined: Fri Mar 24, 2017 8:29 am
Re: 30-30 what's best jump for LA Silhouette 125gr
Jump variation test. Original tests jump was .135". New tests, four groups of five shots, .019 jump and .085" jump. Groups went from 2 1/4" (.135" jump) DOWN to 1.73" (1 3/4)!!
Groups were shot without adjusting scope. That is why some are off center. Wind was 6-12 gusting.
Off to the nationals in a few days. I may have time to work this trigger from 5lbs to 1-2lbs before I leave.
W748 has very high SD 68, Next step. Try same velocity, 2205fps, with 5744 powder which has 6-8 SD in velocity.
Groups were shot without adjusting scope. That is why some are off center. Wind was 6-12 gusting.
Off to the nationals in a few days. I may have time to work this trigger from 5lbs to 1-2lbs before I leave.
W748 has very high SD 68, Next step. Try same velocity, 2205fps, with 5744 powder which has 6-8 SD in velocity.
You do not have the required permissions to view the files attached to this post.
-
- B Poster
- Posts: 69
- Joined: Sat Apr 28, 2007 3:57 pm
Re: 30-30 what's best jump for LA Silhouette 125gr
Excellent information. Thanks for posting.
Nationals in a few days? Misprint? Nationals are at Ridgway first week of August.
Nationals in a few days? Misprint? Nationals are at Ridgway first week of August.
-
- A Poster
- Posts: 152
- Joined: Fri Mar 24, 2017 8:29 am
Re: 30-30 what's best jump for LA Silhouette 125gr
Raton, NM Western Lever Action Nationals July 6-10
run by Jim Luke
run by Jim Luke
-
- B Poster
- Posts: 69
- Joined: Sat Apr 28, 2007 3:57 pm
Re: 30-30 what's best jump for LA Silhouette 125gr
NRA website lists Lever Action Silhouette in Ridgway. No mention of a Western Nationals.
-
- A Poster
- Posts: 152
- Joined: Fri Mar 24, 2017 8:29 am
Re: 30-30 what's best jump for LA Silhouette 125gr
What!? The NRA website is not up to date, oh my
- ppkny
- AAA Poster
- Posts: 994
- Joined: Sat Aug 05, 2006 7:07 am
- Location: Endicott, NY
Re: 30-30 what's best jump for LA Silhouette 125gr
IHMSA53393 & Shootmore:
There is only (1) one NRA National Championship for Silhouette and this year it's in Ridgway, PA. There are forces that over the past 20 years have tried to confuse the issue mostly because of territoriality issues and problems with the NRA. Matches like the Southern Nationals, The TriFecta Nationals (Florida,Louisiana, Arkansas) and now the Western Nationals don't help with unifying our sport, but egos trump everything .
ppkny
There is only (1) one NRA National Championship for Silhouette and this year it's in Ridgway, PA. There are forces that over the past 20 years have tried to confuse the issue mostly because of territoriality issues and problems with the NRA. Matches like the Southern Nationals, The TriFecta Nationals (Florida,Louisiana, Arkansas) and now the Western Nationals don't help with unifying our sport, but egos trump everything .
ppkny
-
- Distinguished Master Poster w/Palms
- Posts: 2324
- Joined: Sun May 08, 2011 3:06 pm
Re: 30-30 what's best jump for LA Silhouette 125gr
More matches to attend are a bad thing? Very unifying…..ppkny wrote: ↑Sun Jul 04, 2021 9:47 am IHMSA53393 & Shootmore:
There is only (1) one NRA National Championship for Silhouette and this year it's in Ridgway, PA. There are forces that over the past 20 years have tried to confuse the issue mostly because of territoriality issues and problems with the NRA. Matches like the Southern Nationals, The TriFecta Nationals (Florida,Louisiana, Arkansas) and now the Western Nationals don't help with unifying our sport, but egos trump everything .
ppkny
Emmett Dibble, Houston, Texas. Where's my buddy Jason? Keeper of electronic records and banisher of little pieces of paper?
-
- A Poster
- Posts: 186
- Joined: Tue Jul 25, 2017 7:13 am
-
- A Poster
- Posts: 152
- Joined: Fri Mar 24, 2017 8:29 am
Re: 30-30 what's best jump for LA Silhouette 125gr
Ridgway is just so far away from Arizona. Both matches are recognized by the NRA. After investigating I discovered Ridgeway is a registered match where records can be set. Raton was an approved match for 2021. That will likely change to a registered match for 2022.
My son tied the Pistol cartridge record for Junior 44/60. If he had shot a 45 it it would not have counted as a record breaker. Regardless the match was run well and we sure had a great time. Good people and made new friends.
Best jump length for my 30-30 it is 2.485 COAL using a 125gr HPFN Sierra with 31.1gr W748. Proved out by scoring a 26/40 and winning 2nd place A division at the SW Nationals 2021, Raton. Max took third with a 25/60
My son tied the Pistol cartridge record for Junior 44/60. If he had shot a 45 it it would not have counted as a record breaker. Regardless the match was run well and we sure had a great time. Good people and made new friends.
Best jump length for my 30-30 it is 2.485 COAL using a 125gr HPFN Sierra with 31.1gr W748. Proved out by scoring a 26/40 and winning 2nd place A division at the SW Nationals 2021, Raton. Max took third with a 25/60
You do not have the required permissions to view the files attached to this post.