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Starline 40-65 (Read 270 times)

JKR Full Member Offline Posts: 129 Joined: Nov 2^nd, 2021	Starline 40-65 Mar 10^th, 2026 at 3:14pm	Print Post
	I just received my wife’s new CPA 40-65 and have begun load work. While waiting for it I accumulated a large supply of Starline brass from various sources. This included 100 new, unfired cases. Upon fire forming this brass went from 2.1” to way short, around 2.080”, some as short as 2.075”. The guy who made the little case stretchers seems be out of business. My only option seems to be forming 45-70 cases to get the proper length. So I have maybe 300 or so short cases. Some fired, some new. Can they be used to form anything else, or are they scrap?
	« Last Edit: Mar 10^th, 2026 at 3:22pm by JKR »

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marlinguy Frequent Elocutionist Online Ballards may be weaker, but they sure are neater! Posts: 17805 Location: Oregon Joined: Feb 2^nd, 2009	Re: Starline 40-65 Reply #1 - Mar 10^th, 2026 at 3:23pm	Print Post
	KAL still sells a more deluxe case stretcher that costs more, but works easier. (You need to *Login* or *Register* to view media files and links) I've never heard of cases getting shorter after firing? That's really weird!

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Ranch13 Oldtimer Offline Posts: 623 Location: East Central Wy. Joined: Jan 20^th, 2018	Re: Starline 40-65 Reply #2 - Mar 11^th, 2026 at 9:50am	Print Post
	Having experience with scrapline 40-65 and a CPA, best I can tell you is just go ahead and use them. They will work ok, plus they probably expanded so much in the web now that you'll play the devil trying to get them sized back down to another chamber.


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Deadeye Bly Frequent Elocutionist Offline Posts: 1126 Location: Stephens City Joined: Feb 25^th, 2011	Re: Starline 40-65 Reply #3 - Mar 11^th, 2026 at 9:54am	Print Post
	Never had any that short, 2.085" was about it. I just kept them annealed and kept shooting them and now they are 2.100 long. I even have to trim them sometimes. I shot the short ones at the chickens as I only had about a 20-30% chance of hitting them anyway.


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JKR Full Member Offline Posts: 129 Joined: Nov 2^nd, 2021	Re: Starline 40-65 Reply #4 - Mar 11^th, 2026 at 10:04am	Print Post
	Ranch13 wrote on Mar 11^th, 2026 at 9:50am: Having experience with scrapline 40-65 and a CPA, best I can tell you is just go ahead and use them. They will work ok, plus they probably expanded so much in the web now that you'll play the devil trying to get them sized back down to another chamber. Don, It’s been ages since I’ve seen any new Winchester brass. I’m using Starline in four different rifles. Every one shows expansion at the web.


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Ranch13 Oldtimer Offline Posts: 623 Location: East Central Wy. Joined: Jan 20^th, 2018	Re: Starline 40-65 Reply #5 - Mar 11^th, 2026 at 10:19am	Print Post
	At one time I had 3 different 40-65's and I had to keep the brass for each rifle seperate. Still have 3 45-70's but with those I was able to use a separate brand of brass for each. My 45-90's I have two that can use the same brass, but the 3rd one is the only one I use Starline in because it's chamber is pretty generous. I do think if you keep using that brass, resize and anneal after every 2 or 3 firing it'll stretch to where you want it.


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steveu Full Member Offline Posts: 112 Joined: Aug 21^st, 2023	Re: Starline 40-65 Reply #6 - Mar 11^th, 2026 at 11:28am	Print Post
	I processed 250 star line 45–70 cases to 40–65 cases. All were new and of one lot. I annealed all the cases before I initially sized them. All of them grew past the required 2.11 inches that I needed for my chamber. I used the RCBS form/Trim die at first. Then I used my RCBS cowboy sizing die to form the next of the cases. You’re going to find out when you weigh those cases that you have collected from different sources a large spread in the weights. And if you measure the internal volume, you will notice a big difference there as well. 40–50 SBN cases can be made from 40–65 or 45–70 cases. I had a bunch of star line 40–65 cases that were way too short. I advertise them on a forum, noting the cases were short and I had no problems selling them.


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art_ruggiero Frequent Elocutionist Offline Posts: 1215 Location: CT Joined: Dec 14^th, 2008	Re: Starline 40-65 Reply #7 - Mar 11^th, 2026 at 12:29pm	Print Post
	i had the same problem with the starling brass made them from 45/70 winchester art


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JKR Full Member Offline Posts: 129 Joined: Nov 2^nd, 2021	Re: Starline 40-65 Reply #8 - Mar 11^th, 2026 at 1:21pm	Print Post
	Art, Yes, I wish I could get hold of some new Winchester. Haven’t seen any for sale for some time now. Steve, You’re right about the used brass. Good thing is, I have no investment there except for the 100 new Starline. I’ve ordered some 45-70. It’s not hard to form them. I’ll continue to shoot and anneal the 40-65 stuff to see if it grows any. Good off hand brass!😁


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