I am doing similar here - is a Mauser 98 receiver with a Husqvarna crest on it - so was likely made by FN in Belgium. I unscrewed the 30-06 barrel that was on it and have been fussing to install a 7x57 barrel that once was on an "Alpine" rifle - former owner had the barrel chamber deepened - I do not own a 7x57 reamer, so mucking with my lathe to get that barrel screwed on to correct headspace. The barrelled action showed up with no bolt - so I am using a "sporter" bolt - probably from a Parker Hale rifle at one time - I started the process by checking and lapping those bolt lugs to that receiver - when I started, only one lug was touching to its seat in the receiver.
In a Dave George book here about Boer War - apparently was not uncommon for Boer fighters to abscond with a turned down carbine bolt to use in their long infantry style rifles - just replaced the bolt and used it - no evidence of any checks or fussing - seems to have generally worked out for them. Of course, is probably no records, nor would we be reading about instances when it did NOT work out.
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There should be a picture above showing what is likely a Boer rifle from the 1899-1902 War. The receiver and the bolt have different serial numbers. Were made by Leowe in 1896 and shipped to a Boer state - appears to be of the pattern of 1893 patent by Paul Mauser. Both serial numbers were used on rifles made about the same time - that bolt's number was on a carbine rifle, and this rifle itself was an infantry style - which would have had a straight handle bolt. I have no clue if the bolt was swapped out when in action, or during the many decades since that War and now. I have not yet fired it. I have no clue if both lugs bear or not - my intent is to maybe fire it one day, with really "mild" 7x57 hand loads - that is "mild", as in what could be handled by the single lug Norwegian Krag rifles.